He thought the defender would have expected the shot and tried to get ahead of him, which would have allowed the ball to get to Wilshere. As it happened, the defender managed to block it, but you could tell it was more luck than judgement because Boyce wasn't expecting Walcott to leave the ball.
But it's obvious some people are so blinded by hatred of Walcott that they get off on criticising him, which is fair enough, it's a free country.
So are we just basically all happy that we'll get 4th (as we always do) and nothing changes as usual.
For the 1st time there was some real pressure on Wenger after the Bradford loss and it looked like he might be pressured into signing players, that's now gone of course but what it shows it that the only way we'll ever seen any changes is through results not going our way.
Personally I prefer short term pain for long term gain, that is to say I'd be happy for us to get the results we deserved if it meant we saw changes at the club at last which would benefit us next season and the season after etc.