Pugs on rep side are just as terrible.. But I believe on rep side there's just more guilds deciding to run a premade, which results in a higher chance of getting two of those together. What I also see a lot more on imp side is jugg/mara smash spec roaming the field together, killing everything they see; but caring about objectives isn't part of their religion. Sometimes, when you aren't strong, you have be to smart. Quite a lot of imps don't act like being.
Hey, I am not trying to generalize to look everyone bad, it's what I've noticed ;D Should make some vids of normals, if only my pc allowed me to do so