All mine were done without sedation, though I think they might have gotten better ratings if they'd been sedated. They passed, and that's all I cared about.
I was rather surprised when I did Tully (first one I've done), that they could position her without sedation, I'd have thought she'd be too wiggly. But I've come to expect it now. I do think the positioning might be better if they were sedated. With Pirate's, the vet told me they couldn't get his legs into the full stretched position because of the muscling, but that OFA would allow for it. Pi's sister was done with full sedation though (prelims, she was having X-rays done at 20 months old for a limp in front, so her owner chose to X-ray everything.), and was positioned normally.
Eva, done with full sedation:
her brother Pirate, no sedation:
Eva came back as "Good", Pirate as "Fair". I do think that Eva's hips have better conformation than Pirate's, I don't think it's just positioning. But I think if I was genuinely concerned about hips, I would probably want them done with sedation.