This is an interesting thread.
I was about to 'experiment' with 3 meals vs. 3 meals + snacks and decided to do a bit of online research first. I found this interesting site
http://www.doctoryourself.com/nibbling.html which seems to give convincing evidence (citing several studies by reputable organizations) that grazing, or 'nibbling' is healthier than eating 3 meals a day with no snacks.
I know that many people have success losing weight or maintaining weight loss on 3 meals and no snacks, but there appear to be other health considerations relating to eating larger meals as opposed to spreading the calories out throughout the day.
Food for thought!