Kind of, anyway.
I recently bought a new copy of Adobe Everything, and I fell in love with Illustrator CS5.1. However, Photoshop 5.1 (version 12.1) seems to have known brush lag issues that are apparently almost impossible to fix (or else they would have had a patch for it, and certainly not had these same issues in CS6), which complicated my painting attempts.
Fortuantely, I had a copy of CS, though by the time I decided to use it, I was kind of burned out on trying to find a definitive solution to this problem. I started doing a single-layer painting for some reason and about 75 History states ago, I might have had something worth showing (like I said, burned out), but now all I have is this.