I use to use a 15 inch 2.2 c2d mbp in 06. I'm getting a new 13 inch non retina mbp. How do they compare? Im not talking gpu or screen size. Just general computing.
There's a huge difference. I went from a late 2006 MacBook (2.0GHz C2D, aside from the GPU, not much slower than yours) to a 2012 13" non-retina MBP and it was a huge jump. Even simple things like browsing the web and using Office are much snappier. If you go by Geekbench scores, you're looking at 2.5'ish times faster.
You don't have to feel it... benchmarks in this case are clear as day.
A GPU from 2006 is no doubt slower than any of today's integrated GPUs ( generally speaking of course ).