No he's not, in terms of effectiveness. Why? On the right he always has the first option of delivering with his right and that's when he produces more - that's what carried our attack for most of 2010/2011. On the left he doesn't have that option, his crossing is erratic with his left foot, he has to dribble more and look to shoot, and he ends up being inconsistent and losing form. He may have the odd good game playing on the left, but he really produces consistently when he's on the right. In fact, his periods off-form and of being called inconsistent and frustrating always coincide with him being put on the left to accommodate Valencia... that's not a coincidence.