Good comments, Mark.
Yes, they might have different issues. I am more inclined to think Williams has technical issues.
Ukhov can just never be pinned down. When he opened with 2.30 beating Barshim it seemed normal and then.....2.15. Maybe he has not trained much, although he did say he had no clue what happened. Last year Ukhov did not have his usual strong indoor season, but outdoors, better than ever.
At this point I really can't see him beating Grabarz in Birmingham on Saturday. But then again, he's Ukhov!
Of the current world stars I think Grabarz has the best clearance technique of them all. Almost Holm like but 4 inches taller
I remember something Holm said about maybe competing too much indoors around the time he jumped 2.40 in Madrid in '05. He felt he was jumping better than ever and he just had to utilize it. The outdoor season could take care of itself.