Yes, most definitely -- as mentioned you stop being hungry anyway, and you get a bit of a 'high' as well, perhaps due to the typical drowsiness of digestion not being there...

My pet theory is that we evolved it, as hunter gatherers we probably had to develop a way to sharpen the senses in case the family/group was running out of food. Ie the Next Hunt can't fail. I think it's a cute idea. Very likely completely baseless :-)