I doubt they are short staffed with tech support but the time it takes for an admin to get to your ticket has gone up. I've been pushing about a week for one problem which I'm pretty sure is going to require an admin since it's rather complicated (SPF records for ded fail when using webmail because webmail doesn't use ded for smtp. It uses webmail1.sd.dreamhost.com -- I think).
I still miss the old DH were admins and support were pretty much one. It seems like every problem I come across takes at least two tickets before it gets escalated. My fav was it took DH over a week to notice mysql wasn't running on my box. Oops!
However, once DH notices the problem they actually fix it right. In fact, I had one great experience where Dallas went through and reconfigured the Jabber package to fix MUC and SSL keys. Support like that is probably why I continue to stick with DH and recommend them.