I think it's too tricky to answer. 100% of what, exactly? Before the dysplasia/arthritis sent me on a downhill spiral? Or from just before surgery?
I would say that my resurfaced hip feels like a completely normal and natural joint that was never diseased. It is so completely pain free that it's become difficult to remember just how much pain I was in prior to surgery. I no longer feel any limitations from the joint or the surgery. However, the surgical side is still weaker. I can feel a definite strength gap between the two legs. There are certain positions that are difficult for me to move the surgical leg into, or that don't go to the degree that the other side does. These aren't everyday movements, just fine motor skills used once in a while. For example, to do the yoga pose Vrikshasana (google an image) with my surgical leg as the bent/half lotus leg would be problematic. I would not currently be able to get my leg into that exact position, and I would have been able to at one time. I don't do yoga, so not being able to do this isn't exactly something I'm stressing over, not to mention plenty of people who never had arthritis probably couldn't do that anyway.
I am satisfied with what I can do now, and happy that my strength will continue to improve. As for 100%....well, I'm substantially better in so many ways than before I had the surgery, even if I have difficulty with certain fine motor skills. I'm definitely not where I was physically before the dysplasia/arthritis took me down. Since I'm several years older than when this all started would I be that person anyway? Who knows.
So, yeah, I don't think I can ever answer this question the way the OP wants. It's time to go out for my walk now, and that's something I had lost the ability to do before the surgery.