The screen drawing speed was so slow in Painter 12, even after I updated everything a million times because Corel couldn't just pack all the updates in a single SP. I also checked the memory usage and it never used more than 600MB, definitely less than 1GB, I seriously doubt it's using all the memory.
Painter 13 is so far a lot faster than 12 so far as I can tell. I can actually use fairly large brushes with very little slow down. Loads a lot faster as well. Needless to say the workflow has been improved a bit but they could have probably done a bit more.
My observational skills may be great but I said nothing about my drawing skills