I love beating the imp premades with pugs but it also helps if you have teammates from known guilds ie Don't Panic, Synergy, Hey I'm NOT MVP, etc. It only becomes a nightmare when you have some of the unknown guilds even I didn't know existed on the Pubs usually sporting PvE armor (I swear I'm seeing more of them daily).
But after rateds die down we still need to do our dailies on alts so I'll solo queue for a bit and usually see the W/L ratio about 60% wins and 40% losses but on huttball it's usually 80-20% with imps usually winning that one. Pub PUGs just seem to want to teamdeath match that one. I do however notice the imp premades abuse the bubble stun more than the pubs, but that is in their nature so it's to be expected.