To be honest I think he gave Upson enough of a chance, he gave him a run in the side and he didn't do that well, he might be doing alright at Birmingham, but if a player doesn't have the mentality to succeed at a big club it doesn't matter how much time you give them. Cole came though and he was up against Silvinho who was a great player for us at the time.
Though I would like to see more English players at Arsenal of course, it's hard to think of many that are good enough though, especially ones we could realistically sign, ie not at one of our rivals.