Valverde wasn't exactly very good at TT's until his ban when he took the opportunity to actually learn how to ride them. When he came back from his ban his TTing was inconsistent and now it's back to being poor again. Pre 2010 Valverde was good at climbing, sprinting, biking handling, descending, positioning, but wasn't very good at TTs.
That's just not true. Been following him closely since his Kelme days and when I read that it didn't sound right at all so I had to double check.
He's almost always been a good if not elite tter and was very good from '06 - '10. Results from every itt he raced during that period, the overwhelming majority in high level races:
06 - 2, 2, 14, 7, 9, 5, 4, 3
07 - 1, 2, 5, 1, 5, 9, 32, 46, 17, 1
08 - 1, 16, 3, 1, 22, 34, 5, 3
09 - 3, 2, 3, 12, 2, 4, 9, 13, 7
10 - 31, 2, 13, 2
So, 28 of 39 times he finished inside the top 10 and 23 of 39 were inside the top 5 with 16 podiums. That's not someone who "wasn't very good at TTs"