What sense did that make? Macs run games at full speed, just lower settings a bit if the game is stuttering. Simples.
All you need to play games competitively is bootcamp, a good mouse, keybinds and decent APM.
Only noobs think competitive gaming is about having a good GPU. That's why they get their mom to buy them a shiny pimped PC. Then they go rage on the forums about balance cos they really they suck.
Haha that's hilarious, it sounds like an accurate description of most people I come across online. As a SC2 player, I play mostly on low settings because I find that it not only lowers latency, but it's easier on the eyes and I don't get as distracted with how "pretty" all the lasers are.
I think the person you're arguing with is trying to make the claim that competitive gamers shouldn't play on the mac, but mac's should be able to play on maximum settings because... it's expensive? I'm not really sure.
Is there a category between 'professional gamer' and 'casual gamer' that would accurately describe a graphic-obsessed gamer? I mean personally I think that video showing the skyrim play was pretty decent, I wouldn't complain if that was me.