BG queue times are instant most of the time on the horde side. However, people play only the battleground of the ongoing weekend, so do not expect AV pop during WSG or AB weekend. Horde pugs are struggling because the overall quality of team composition is usually better on the alliance side for some reason. On the contrary, horde premades win like 99% of the games.
Speaking of 5 ppl dungeons, there are lots of groups running any kind of them during the EU prime time. If you want to look for 5 men group in the off hours - it might be slower, but still absolutely doable.
