You could call it that. I actually go to sleep through the night last night for the first time in a long, long time. Woke up at 7.30, there had been no kids yelling out, crying out in the night etc etc etc. I couldn't believe it. lol
Ours are actually pretty good... you're always gonna get the odd harsh night but they sleep pretty good. 3 might be rougher than 2 as you are out numbered! How old?
Mine sleep from 7-8pm through to 6-7am every night, with just the odd exception. #3 here in September too.