It is a comparatively small amount of food, especially if you're splitting it into two meals. When I first switched to raw, I felt the same way. I found, for myself and my dogs, one meal a day was actually better because they got one big portion which seemed to be more satisfying than two small ones. It seemed a little counterintuitive at first, but ultimately, it's what's worked best for me.
That being said, if you have very small dogs or a dog prone to hypoglycemia, feeding multiple meals is better. You do get used to the smaller portions after you've done it for a while!