Has anyone had trouble with speed on their tt

Dougdeacon is right.

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Kiddman says:

Everyone thinks they have great speed stability in their turntables until they hear one that does, then they wonder why the stable one is so clear, so natural, so right.

Which tables have great speed stability -- which are the best out there?

Drubin,

It's a vicious circle. We have yet to define speed stability. There seem to be various camps when it comes to the finer points of that definition.

I'll say this much; I believe it is a relatively narrow field.

Syntex has some good insight on the subject , but first ill ask, is it no wonder some have gravitated back to using the very best of vintage tables.
Syntax's comment which also crossed my mind , he said "Some inexperience manufactures simply did not do their research and home work, how true.
My $17,000.00 up front turned into 10 months of frustration , two motor controllers later including a check of both motors themselves just to end taking a hit when I sold it, inconsistent speeds were not the only issue , that was evident with my favourite Lps.
However I must take blame of course for believing owner testimonials which convinced me to jump in with both feet,..

Reliability issues are more common then some think however there are other forces at work.

stick with a design that has an AC synchronous motor and a platter heavy enough to have some flywheel effect.

The only time I had serious issues with my table's speed was in the week immediately after Hurricane Sandy. Once my home had power restored things were better.