I think this is a pretty good portrait, but I see where the critique regarding focus is coming from; the hair appears to show more detail and accutance than the eyes in this web size version.
That being said, I don't think we can discuss critical focus on a small image like this and retain credibility; it's simply the wrong size for it, unless the focus is way off, which it clearly isn't.
I'd rather like to focus on the subject matter, the lighting and the moment that was captured. I see little to change here, perhaps burn in the brightest areas a smidgeon. Then again, that may also look very good in a full size print.
Well done indeed!