yeah there's one version of sketchbook that's pretty convenient where ALL the tools pull down in one menu...i can't recall which. but the lag distance is like 1/4"...you'd think a quad core can deliver better.
i don't do long strokes. since i use the app for thumbnails my strokes are short, HOWEVER i do execute the strokes quickly and that may be the rub. i'd have to cut my execution time by 50% for the app to keep up.
btw...on the shape tool, of which there are 2, rectangle and ellipse,,does it color fill or just outline?
they should subdivide the category because a lot of that stuff is photo editing and goofy pics for kids.
whew,,there are a couple of ipad apps that are perfect