I am quite surprised by the minimal amount of twitch playing timed puzzle solving (and advanced courses), but I haven't played the first Portal for a long time. Now, I'm combing through the game for achievements and the developer's commentary (as well as changing the FoV to something less nauseating).

Portal 2 needs more butt-hard puzzles, definitely in co-op. Thew and I managed to solve them all in 2 nights.

But yeah, throw me a co-op invite sometime at Brave_Dragon.