I got Shank 2 through Humble Bundle, and the performance is pretty awful. Have any patches been released? Shank 1 had a similar problem that was helped by a patch posted on Icculus (but not shown on the main HB site, or the support site - or anywhere else, AFAIK).
Yes, I'm on integrated graphics, and yes, I know that what goes for Shank 1 does not necessarily go for Shank 2, but still ... Patch did help for 1, so I'm hopeful.