I definitely think so. She's been on the Worlds podium every year she's competed (the last four), and has an Olympic gold medal to her name. That's a better result sheet than Arakawa, Hughes, Lipinski, Baiul, or Yagauchi had. And of course, an Olympic champion doesn't mean you were one of the best ladies figure skaters (Hughes...), but that's just as a comparison. I'd put her behind Kwan and Slutskaya for now, the latter because of the way she was really able to stay or near the top of the sport for 10 years, in both 6.0 and IJS. If Yu-Na sticks around another four years and continues to push the envelope as well as stay at the top of the sport, she may very well be the best ever. She's not far from it, and definitely capable.