I think level does need to be considered as a factor. My alt has just gotten to SB. I've noticed since the server first started that queues for everything except Alliance Raid have gotten faster. I got lucky on an AR yesterday with just CT unlocked currently that it was about 10 minutes. Normal Raid took me about 40 minutes and was my longest queue. When the server first started, even Leveling took a long time.

I think the endgame probably is sparse as some report, but I feel that's because new players are still progressing. It feels very much to me like when Jenova was new and small and sometimes our queues took a while and if you got there before the rest of the population caught up, then it would be even slower. Now we're regularly congested. I do think the DC needs more time for the population to get up to the current content. The 50/60 content seems to be fairly well populated.