I realise this post is getting a little old but just saw it. DD3 was 6.5 weeks early and IUGR so tiny. I always think of her in terms of adjusted age but she's always slept far more than normal for her adjusted age too (still taking two naps at 20 months). So if your boy seems to want lots of sleep, don't be afraid to follow him. Just watch out for signs he needs an increase, as Katherine said (that's my main downfall when it comes to EASY!).