What was the time control?

Usually White will play c4 anyway, so this is rarely a problem. Some people like to play the Colle system with c3 - d4 - e3 pawn structure and with the idea to play e4 later.

In effect a Queen's Gambit a move behind?

Here you have to expect also 4.c4.

This is all true, but I would rather leave the pawn at c5 in order to have some central pressure. Usually I would play something like this: e6, Be7, 0-0, b6, Bb7, Nbd7 (the order of moves can vary depending on White's moves).

Agreed, it is better to maintain the tension than release it in this way. Apart from anything else, White now has a much tighter grip on his d4-square.

White can also play 5.a4!? (in order to prevent reinforcement with b5) before playing b3. White's plan is then to play c4 as soon as possible to put some pressure on d5.

6.a4 is interesting again, when both 6...ba4; 7.bc4 and 6...Qa5; 7.Ba3! favour White

I disagree, 9.Nb1 just undevelops White and after 9...Rb8 or 9...Bf5 things can get messy.

Not bad, but I would try to get that Bishop on b1-h7 diagonal (looks pretty juicy). So maybe 10...h6!? with the idea of 11...Bf5 is playable

?! Dunno what that was for   11.h3 or 11.0-0 is pretty logical here

His lost tempo doesn't hurt either