Is This Restriction?

I only have a vague idea of "restriction" - that you are full on a small amount of food and not hungry all the time, but not sure what exactly it should feel like, if that makes sense. Wednesday, I had a Lean Cuisine Chicken Club Panini for lunch, these tiny sandwiches that pre-band, I would eat as a snack and still be hungry. I probably could have eaten 3 of them without flinching before the surgery. However, when I ate one for lunch around 1 PM, I was still full until about 5 PM, when the first little inkling of hunger started coming back. On mushies, I was hungry within an hour or two. Is this what restriction is? Or is it just shock for my stomach going from 3 oz of mushy food to 4 or 5 ounces of more filling solid food? I don't want to get my hopes up, but it seems pretty consistent the last few days, I'm not hungry for awhile after meals. Of course, since I'm back on solids, I haven't been eating the greatest choices, but it's conscious and I know I'm not going to be eating again like this.