Sounds pretty normal to me! Growth spurts don't follow any rules. My kids would sleep for days, eat like crazy-OR- act like they are starving and then I can'tkeep enough of ANY food in the house. Next thing I know, the clothes they wore last week are 4 inches short or stuck on their heads because they don't pull down over it!
With growth spurts, I've noticed my kids habits change. Not so much at 10 & 17 but when they were under 6/7 yrs, each spurt made changes...they would eat a little more, drink another gallon of milk, etc. Remember, too, they change their likes and dislikes frequently. A food they couldn't live without suddenly becomes YUCK- usually right after you've purchased stock in that particular food, too.
My 17 yr old has slept, eaten, slept and eaten for the last 2 years with no growth spurt attached. He has at least one more still to go and I'm dreading the day he wakes up and hits his head on the door frame- he's already 6' 3". I think, so far, he's only gained 1/2 - 3/4 inch in those 2 years. For the amount of food, milk and sleep he's plowed through, he should be 20 feet tall!
Be glad he's eating healthy stuff and gets plenty of excercise. The spurts do fade away, until the next one, and as long as the rest of him is healthy, relax and enjoy.