Not quite...try again with a Ki-43, starting straight and level. If you can make a complete snap roll like in the clip, ending on the same altitude, attitude, and heading that you started, I'll give you a virtual handshake.
0:36 and 0:45
This game seems to model it well:
And I'll make myself clear: Snap rolls are possible, but they are very ugly in Il-2. What you demonstrated in the first post was the "Il-2" snap roll. The plane's nose came up and it started wallowing about, out of control. A clean snap roll, like in the video is impossible in the game, which is what Caspar and myself are arguing.