i haven't noticed a difference. there have been times when i couldn't eat for hours after a workout, and this was on an empty or near-empty stomach. i still recovered fine in the days following the workout. i didn't feel or perform any weaker during my next workout.
i've also experienced the opposite: i've had times when i eat like crazy post-w/o and felt like i didn't recover well in following days. i'm not convinced that nutritional "timing" is a factor, and i don't think i'd ever take anyone seriously who argues it's a major, game-changing factor.