"8.Qc2 Nc6! 9.e4 Nb4 10.Qe2 Nxe4 11.Nxe4 fxe4 12.Qxe4 e5! "intending 13...Bf5, activates Black's game". - At least to me it's not obvious why 13.dxe5 Bf5 14.Qxb7 here is so much worse than in the next example..."
The missing pawn on e2 plays a role. Still I think Black has to prove his compensation after 14.Qxb7 Rb8 15.Qa7 Bd3 16.exd6.
On TalJechin's other question I am not entirely sure, which line he means. Anyhow, after 8.Re1 Ne4 9.Qc2 Nxc3 10.Qxc3 Nc6 11.d5 Bf6 12.Qc2 Nb4 13.Qd2 e5 14.a3 Na6 15.Qxa5 e4! the White queen is in danger of getting trapped.
Personally I think, that White can prove an advantage after 1.d4 e6 2.c4 f5 3.g3 Nf6 4.Bg2 Bb4+ 5.Nd2! So I am curious what bravehoptoad recommends.
Schwarz' 1964 book on the Dutch spends 30 pages on 4...Bb4+, but only 4 on 5.Nd2. Why don't you post your reply in Glenn Flears thread, where I already made the same comment?
At the other hand the more common 5.Bd2 relieves Black's position. After exchanging bishops Black has hardly problems forcing e6-e5. In my opinion White's queen's bishop is the strongest light piece, so it is a positional error to give it up so easily.
I also think, that White can prove an advantage after 1.d4 e6 2.Nf3 f5 3.g3 Nf6 (b6 is also along Indian lines, but after 4.Bg2 Bb7 5.o-o Nf6 6.c4 White has the dangerous threat of 7.d5!) 4.Bg2 Be7 5.o-o o-o 6.c4 Ne4 (Alekhine Variation) 7.Nbd2 Bf6 8.Nxe4 (in general this is why I do not like Ne4 too much) fxe4 9.Ne5 d5 10.Ng4 Be7 Vaganjan-Bronstein, Leningrad 1971, 11.Bf4! c5 12.dxc5 Bxc5 13.Rc1.
I have corrected the typo's Alumbrado refers to in his next post. I am glad he still reads my posts.