To address the first topic, I find Lang Lang to be a rather superficial pianist. He seems to have no concept of the form or overall structure of a piece. Listening to him reminds me of someone sightreading rather well, having never heard the piece before. His getting carried away with showing off technique is inexcusable, as it is for any any other pianist. His physical motions are pretty absurd, but if he played well, that wouldn't really be much of an issue.
However, not missing a note is not necessarily a bad thing... we all try to do it. One shouldn't be faulted for that alone, no matter what other problems you might have with their music.
This comparison with Yundi Li and Lang Lang is getting tiresome. Li is a wonderful pianist in his own right, and because there's another popular Chinese pianist roaming about doesn't mean the two must be compared at every turn. The two are utterly dissimilar, and Li is in a league of his own which Lang Lang would never reach if he continues his theatric, empty playing.
"Aggressive Bravura" is not exactly uncommon in femaile pianists. Delarocha, Argerich, Kern, and Nikoleyeva (off the top of my head) all posses the ability to beat the hell out of a piano, and certainly do so on occasion. Helene Grimaux does not play with such aggressive flair, but you could just as well attribute that to a French style, rather than a style common among females. To be quite honest, I don't think there is any consistant difference between male and female playing, when it comes to a professional level. One cannot listen to a recording and say "that's a lady playing."