Let's not rewrite history. The guy has made up for his lost time since that decisive World Championships win, but to say that it was rubbish to say he seldom attacked before then is a fallacy. He wasn't the Leipheimer clone he was sometimes made out to be, but Evans is a guy who has traditionally gone deep into the red to stay in the front group, so when he's really on the rivet, if he drops, he drops hard. He's like the polar opposite to Carlos Sastre, who would let go of the group and then ride the climb like there was nobody else there; several times we'd see him gapped early, only to reappear near the front at the end. But there were a number of times when Evans would sit in and be happy to go at the group's pace, and not take the initiative. For a long time, it seemed like he was too scared of losing to try to win (and for a long time, he held the advantage in the TT over his opponents and therefore he could afford to, as well, of course). It was only relatively late that he got over that. The World Championships win was a big part of that, and the psychological difference that the move to BMC made. The BMC team in 2010 was far too weak to support Evans, yet his results almost matched those of before then (plus he actually won important stuff like Flèche and the Montalcino stage); he had been given some disappointing support teams at Lotto, but at BMC he was handed some backup that was simply not good enough even on paper, yet it was almost as if knowing going in that the team wasn't strong enough (as opposed to just fearing it at Lotto) made him more determined to prove the doubters wrong and go all in for himself.
And I referenced Valverde simply because Valverde seemed to have a bit of a psychological hex on Evans for a while, and Evans developed a habit of being a nearly man in the races Valverde was winning. Of course, then The Don went bye-bye for a bit.