I tried the raw thing last summer during fruit and veggie season in the north, and found myself famished most of the day. I brought what I thought was a good deal of food, but by noon, I had eaten it all. I don't think my messenger bag is big enough to carry enough food for me if I eat raw while at work.
I bike a hard 5 miles each way, which certainly counts for how many calories I have to take in. I did the FitDay calorie count and found, if I had raw foods with me during the day, that I was only taking in about 500 calories. 500 calories=STARVING.
I want to get back to eating much more raw stuff since it's getting to be that season, and since I had a really bad backtrack on my diet over the winter, so I'm looking a little mushy.
I think that no mater how much it seems like you're eating, you have to consider that a banana has only 140 calories, and an apple has 74. So, it does take a lot to make you full and keep you full on the raw stuff.