I play on the Imp side. For the past 3 months, I only queue during GMT 8+ evenings in 4man pre-mades and win probably 95-100% of my games, even against the infamous gi/goof troop/boss/5% pre-mades.
For the last 2 weeks, everyone I usually play with is away during the holiday season over here, so I have been solo queueing daily in my mid afternoons/early evenings by myself. I win probably 10-20% of my games now. There has been thrice I remember having to play 6 games to finish my dallies. My impression is Rep side are now filled with many good pre-mades, or their pugs just generally play better. The current Imp premades are very average and have loser mentality, giving up way too easily. I've had APAC transfers 4m premade, W**kie Leaks hiding like wussies@South in Novare coast for 5mins upon losing east and west. Probed them why, they tell me, "We didn't come to Harbinger to get pounded on by the Core jerks(Dar'nala was harder of The Bastion now) here.
Another example, I actually have ppl in a pre-made from W*MPA, telling me "Do you know how hard it is against gi and Parathian?". I loled:D. End of the game, I do 800k, Rep side filled with 700+ and one 900+, below I see 300-400k Imps.
The Imps premades now imo are simply outclassed. And no, they are not new players. I do win 70% of my Imp lowbies when I solo queue tho.
The way to get over this is for the clowns on Imp side to get better. Give and take probably another 4-6 months, but we will get there