The pawn formation c6-d5-e6 is considered to be more reliable. But this opinion is not so well founded and arose not so much in connexion with the objective advantages of such a setup, as well under the impression of several brilliant victories, in this variation achieved by worldchampion M.Botvinnik on the strongest players of several countries.
It is hardly to believe, that a setup, in which Black the development of the queen's wing postpones by purpose, because of strong, but always to repel mating threats on the king's wing and in which Black, to avoid a quick opening of the centre with the move e2-e4, is forced to weaken several important squares - it is hard to believe that such a setup is only preferable to the less obliging positional plan with the move d7-d6, because White can easily advance the e-pawn to e4.
Concerning the opening of files, this is a double-edged matter. It is not always clear, whom will favour it. For instance several games of a zealous advocate of this variation, of A.Iljin-Zjenevsky, are known, who just waited until his partner with the move e4 opened the e-file, after which he immediately passed on to the simultaneous opening of the f-file and, after he supplementary played e6-e5, freed Bc8. After this only few succeeded in saving themselves.

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Agreed, but I'd be interested to see statistics on the number of games that went 1 d4 d6 2 e4 versus 2 c4, 2 Nf3, 2 Bg5, etc.  My gut instinct is that the majority of players who open with 1 d4 will be reluctant to transpose into a king's pawn opening.  And if they did, how booked up would they be on the Pirc.   

Yes: Black should definitely think twice here, but I don't think the Pirc's so unplayable that it puts 1 ... d6 in such a cloud.  As it happens, I'm finding myself on the Black side of an Austrian Attack in a correspondence thematic tournament that began 1 f4 d6 2 e4.  Will make sure to go over the relevant posts in 1 e4 ... threads.

This reminds me...Chepukaitis said 1. Bg5 would have been his favourite move had the rules allowed it.

Problem with J/T's "explosive" 1...d6 is the transposition to the pirc. i do not think the original poster wants to be hacked with the austrian!

What about Yrola & Tella's recommended repertoire against 1 d4?

1 d4 d6 2 c4 e5 3 Nf3 e4 4 Ng5 f5 5 Nc3 Be7 6 Nh3 Nf6.

I suspect the bigger problem against 1 d4 is what to do after 1 Nf3/1 Bg5/etc.

I suppose the odds of a successful kingside attack against a strong and prepared player are slim with the Czech Benoni, but many years ago against average club players (ok, maybe we were below average) I had quite a few nice attacks.  After the usual ...Ne8, ...g6, ...Ng7 and eventually ...f5-4 it was of course quite similiar to the KID type attacks.  Of course I don't think that plan is always feasible, especially against some of White's better options.

Actually, I liked it so much I started playing a horrible opening against 1.e4 to try and get it.  1.e4 a6 2.d4 c5? 3.d5 (3.dxc4 is probably strongest.  Of course a lot of moves are pretty good here including 3.d5, but I had 2 wins and a draw with this before I decided maybe I should play a real opening.) 3...e5.

Let's say Grand marnier decides to go with the Czech Benoni (or for that matter anyone).  Is there a book you would recommend to learn this opening?

Hello,
I do with the white pieces feel well with a setup that include e4+Nc3+d3+f4 (Vienna Game, Grand-Prix-attaque, King Gambite). I dont fight for center control, I better close the center and attack kingside. 
I score also very good with it (internet blitz: 75 wins, 30 loss).

I asked in another thread in e4-forum what to play against e4 with the black pieces to reach some similar setup. Might not exist, I believe. 

Anything against d4, what could be similar? I considered the Dutch, but there is a main difference. With Vienna Game, Grandprix-attaque I have a rather safe position for the king and then start the attack. Its different in the Dutch, isnt it?