I attended Friday, and agree with everything abatt said about Cornejo. A wonderful performance - his bearing, the way he held the stage and his brilliant technique which was performed with an ease and eloquence befitting nobility.
Maria Kochetkova is a beautiful and accomplished dancer. There were very few glitches (there was the 2nd act diagonal of turns when she traveled so far she was barely on stage to finish), and lots to admire. She and Cornejo are well matched in size and proportions so their pas de deux work had many, many lovely moments.
She was not, however, transcendent. I should perhaps admit to where I'm coming from. I've been watching ballet for over 40 years, and at this point am not a fan of most full length story ballets. I usually stay away, but bought a ticket to see Alina Cojocaru do SL. To me she is a dancer of such musicality and imagination that she invariably reveals things to me that I didn't knew were there, or could be there. Kochetkova's performance was good and enjoyable, but there were no revelations. That said I look forward to seeing her doing rep. with the San Francisco Ballet when they come to NY.
A few comments about some other dancers. Simone Messner was a delight in the pas de trois. Everything is there - jumps, turns etc. but the nice thing is that it is all done with a naturalness and joy that is a pleasure to behold. So many dancers do these variations with affectations or a "style" that looks grafted on.
Gorak danced well and carried the role of Benno quite believably. I imagine he will be promoted soon, and perhaps will be a principal in the future. He appears to not be stuck the way IMO Joseph Phillips unfortunately is.
Jared Matthews was terrific as the Purple Rothbart, no he is not Gomes - sometimes even Gomes isn't Gomes, but he danced very well, with no technical issues and made the role his own. I just have to add that in the section with the princesses, I couldn't take my eyes off of Sarah Lane. She looked gorgeous and glamorous - her creamy port de bras so beautiful. She'd be the princess I'd advise any prince to choose!
Last thing - music. There are a couple of sections of corps dance when the music suddenly slowed. Why? Is it to make sure the all dance together? If so why can't they dance together to music that isn't distorted. Also in the Pas de Trois - the three dancers stayed together but were behind the music. I'm not talking rubato - just behind the music. They stayed together, so I have to conclude they were coached to do it that way. It wouldn't be fair to say that in this company music isn't a priority, but I can safely say that in this ballet music definitely takes a back seat at ABT.