Seriously guys, it's like tennis guys arguing over their gear. They hyperfocus on every little detail because those things are easily obsessed over. The truth is, I could play against Nadal, giving him just an old sneaker to hit the ball with and he'd still kick my ass. You can take fantastic pictures with a crop sensor camera and a little skill. Just don't tell Canon that, they want you to want 12 frames a second.
It's been interesting for me to recently see photographers I've been following, talking about how they're enjoying the X100, and anticipating the X1 Pro. Simultaneously, others have been heading to Medium Format!
For all, they're focused on lighting, good light. And they can pull good shots - be it for Photojournalism (Mullins), wedding photography and some glamour (Lovegrove), flash photography (Hobby), bands and other (Arius).
I guess there are a *lot* of factors that contribute to getting the pop you're after.