Having the sail drape over the leeward boom body certainly changes the way the sail feels, but it may add improvement in the end. I doubt it, though, because virtually all FW racing booms were redisigned with a super-wide clew to prevent the sail from wrapping over the boom after the OH is dumped. The boom companies would not have spent the money retooling if the sail designers and testers thought it didn't make a different.
Maybe what Kevin means is that the issue is not a concern to him because there is nothing he can do about it short of changing boom designs. If you need less outhaul you do what you must.
Mr. Swift, setting the ouhaul is first done by measuring tape. Refer to the distance from the boom only after you tune it using other methods.