I've got a Macbook Pro, Macbook, an iBook G4, PowerMac G5 Desktop, iPhone 4S, iPad, iPod touch 4th gen, iPod touch 3rd gen, and, eh iPod touch 1st gen. sexy beast 1st gen.
As though I was a PC user and have had over, 6 PC's and both under 4GB RAM, and under the PC specs of a dual core processor, My mac beats them, regardless of specs, my Macbook from '06 turns on and runs faster than my Macbook Pro from 2012. Etc,
Software wise there arent' many programs that are on PC for Mac, but theres more appearing than years ago, also there are also Alternatives such as FRAPS for PC alternative is Quicktime, etc.
It's usually GUI matter for most people that just want a mac but for CPU power, i guess they are OK. I get better FPS on Minecraft with my Mac than my PC with similar specs.