Has anyone had trouble with speed on their tt

As moonglum says, static buildup can be an issue. I never had stabilty problems, but the controller on my TW Accustic Raven one, suddenly switched to about 300 RPM, luckily, not with a stylus on the record, or that would have been toast. It was indeed due to static build up and the unit was replced, free of charge, with no quibbles, even though it was 3 years old, now that is service. I don't think spending money on kit prevents maintenance issues, perhaps it should, it improves quality and hopefully, after sales service.

One other thing to try, I found using a good, after market power cord, a lessloss, made a big difference to sound quality, which rather suprised me. I thought if one bit of kit would be immune to a better power cord, it would be turntable controller, not so.

I base my speed opinions on sound...if it sounds good (not warble intensive) it's good.

Syntax is right.

Yes from a new $17,000.00 table purchase back in 2008, after complaints a new motor controller was sent to me which the manufactured called , an upgraded motor controller.
Just a poorly designed controller in the first place and the new one wasn't much better.
My ears were telling me there still were problems with this table however mentioning this on the happy owners group I hurt sensitive egos and was called names, really the joke is on them.

Most turntables of "repute" are not withing very good limits. When you hear a real stable one you realize that. The OP and Syntax are not wrong.

And all DC tables, something that is coming back to be more popular, have servo circuits, and all of them hunt, easily audible when you finally hear something that does not drift and hunt, and easily measurable.

Modern economics in high end audio: give the absolute least you can, don't think of serviceability, get the sale at all cost.