DPS in a 5 man is heavily reliant on your class/spec, as well. Hell of a lot easier to rack it up on a good Death Knight/Retribution Paladin/Moonkin/Hunter, etc than it is as a Rogue, for example.
I'm a healer, so about 35ish% of my offspec Ret gear on my Paladin is blue, rest is Heroic/Badge/10 man Raid rots and I was doing 2900-3200 in our guild group the other day (other Ret was going about the same, 0/32/39 DK was pulling 4000... This was a FAST clear, I rarely had time to even use Hammer of Wrath before shit was dead).
My unbuffed stats are good... but not great. 33% crit, 3100 AP, hit capped, 12 expertiese, Claymore of Ancient Power.
Some classes just need some AoE buffs.
On the subject of 5 mans, one thing I want to implore to people is to get the fuck over random blue loot. If you need it, need it, if you dont then greed it, yell at it, look at it funny, pass it, make fun of it, challenge it to a game of checkers, just keep moving.
90% of this shit, at least on our server, sells for more to the vendor than it does being DE'd as a blue shard. People freaking out over what to do with a blue drop in a pug takes half as much time as the damn instance itself.
Seriously, its just so stupid. I'm talking to one of our primary tanks right now who is laughing his ass off because he rolled greed on some fucking blue feral druid staff and won it over an enchanter and their pug is freaking out over it. That staff sells for 3x as much to a vendor than you can AH a shard for.