FWIW, I think it's hard to evaluate stuff in the abstract, not to mention the notion of evaluating how something sounds based on published -- or even measured -- specifications (i.e., quantitative performance).
So -- I don't know if the alleged speed issue with the U-turn is purported to be one of accuracy (the absolute value of the rotational velocity, how close to 33-1/3 rpm it is) or of precision (how much it varies from the mean value of its rotational velocity over time). If the former, unless one has perfect pitch or if it's way off, it may be a total non-issue for any given individual. The latter may be a big deal or a small one, depending on the magnitude of the variability and the tolerance of the listener.
The U-turn gets good press for a very basic (almost crude) bare-bones entry-level turntable. I'd suggest that the OP may want to audition one. Play a piano sustain & listen for variation in the tone (slow variation = "wow", quick variation = "flutter"). If it's either unheard or heard but not disturbing, the tt is probably gonna be fine for him (or her). As to absolute accuracy (pitch accuracy), only the user can judge if it's acceptable to him or her. Let's say it's exactly and consistently 0.5% slow -- the pitch will be off (flat) and the tempo will be slightly slow... but whether either matters to any given individual is going to depend mostly on the individual.
Bottom line -- try before you buy, if at all possible. If not, buy, try and if it's OK for you (the OP, that is), it's OK. If not, return or resell it.
All of the above are just my thoughts and opinions, offered 'as-is' and FWIW.