Well I went there in 2006, and I doubt you'd be disappointed.
I was there almost two weeks, and kited every single day, both in the morning and afternoon. Actually I lie, I missed two days because I injured my foot, but everyone else in my group kited those days. I took a 14m and 10m and only used the 10, although there were a couple of days when I probably would have been better off on the 14.
I assume you were looking at this:
www.bom.gov.au/climate/averages/tables/cw_200284.shtmlKeep in mind this is an
average, and they do look a little on the low side to me. The wind is very consistent - almost no gusty-ness. I figure this is because Cocos is this tiny dot in the middle of the Indian ocean and so nothing to induce any turbulence. Also note that the averages for the morning are barely different for the afternoons. Its not really a
howling wind, but its plenty for an average guy on a 10+m kite. Most kiters there were usually on 11-13. You'd never need a really big kite.
The wind is on constantly. In fact, its on 24 hours a day. Its actually kind of weird. You keep thinking it'll die down after the sun goes down, but it just doesn't. If you wake up at 3am, its still blowing the same as it is at 3pm. Its the trade winds. They seem to very reliable in the Indian ocean.
I live on the east coast and its quite expensive to get there. But the reason I forked out for it was because I'd read numerous reports of people trying out Pacific destinations and only getting 2 days of wind out of two weeks. Not that would always happen, just a risk. That would never happen on Cocos. I'm glad I went there.
Couple of downsides, one being you have to be very careful with your baggage. They have a 25kg maximum (from memory) and they're very strict. If I go again (and I may again this year) I think I'll have some stuff shipped over before hand.
If you want more info, PM me and I'll be happy to chat about it.