I have had a couple of Dreamhost accounts for a few months now, and what a disaster. Speeds on both accounts have been TERRIBLE. Slowest SQL servers on the planet? Quite possibly slow. I'm pretty much done with them now that due to their server problems I can't even open my site.
Fortunately there are TONS of alternatives out there. I'm getting awesome speeds on a different host, for $5/month, which is better than 1 of my Dreamhost accounts. Even the other one, at $9 a year, is not worth it.
Dreamhost customer service has been pretty decent in responding in a timely manner. But that doesn't mean jack when their equipment is so poorly setup and managed. Like I said, ANYTHING running off MySQL and PHP have been slow from day one, BEFORE the "Blingy" cluster started having problems.
Too bad really, because I like their control panel options, very easy to use.