In my opinion... If the snake is otherwise healthy, it's nutritional and caloric needs are being met, there's no problem.

From my limited experience... my youngsters seem to do best at a 4-5 days feeding schedule. Once they reach about 800g they start slowing down to every 7 days. The two girls I have that are 1000+g do best on a 7-10 day schedule. Each snake is an individual, and as long as their needs are met and they are healthy...