Yes. I don't know how much, but yes. In fact, you may want to try sizing down 1/2 size, and then going up 1 width. A lot of guys need to do this, due to the length of the 5 last.
You also may want to try out different lasts, to see what works best for your foot, and then start building a collection around that last. Similar shoes are made on different lasts.
For example, if you are looking for a Park Ave, but would rather have it in the 7 last, check out the "Boardroom" - sold by Jos. A Banks. Seconds are available in the AE outlets, or you can of course check them out in person at a JAB.