Hi,after some tests with my ipad2 here's the result.
Physic game with 20 physics objects some of them immovable.
-Pc and firefox:60fps.
-Ipad2 and safari, hosted in my site:25fps(pretty good i have to say)
-Ipad2 through appMobi:5 fps!!!
Ashley what should i expect with appmobi direct canvas?the same result as my test with ipad2(around 25fps)?