Will a later bedtime mean better naps?

[TS123]

My DS is 12 months old and lately will only take one nap for 1 1/2hours, and IMO spends most of his day in an exhausted and wired state. Nothing I do will make him nap longer or more often. So, I've been debating whether to put him to bed later in the hopes that less sleep at night will mean more sleep in the day (according to Ferber anyway). Currently I put him to bed anywhere between 6:30pm and 7pm (usually because he seems quite tired by then and will go off easily) and sleeps until 5:30 or 6am. According to Ferber, when a child sleeps this much at night he will be incapable of more daytime sleep. I'm more interested in what experienced mums on mumsnet have to say than what a "sleep expert" tells me. So please -- any advice?

Might do...might not. That's the trouble with kids - they're all different! I used to keep mine up till 10 or 11 when they were little - they were still napping in the afternoon when they were 3! But of course when they start nursery bedtime has to be 6 or 7 at the latest or they are totally knackered.
My advice would be... give it a try.