lulunut, he is 12mos now. We do 1 nap probably about 5 days a week. I have been doing more 2 nap days recently because he seems to need it. Two weeks ago I think he was going through a GS and was sleeping well, and taking 1 2-2.5hr nap everyday! Now it is often 1.5hrs. So he needs some catch up days. Though today he napped about 1hr 45mins which isn't bad.
I think it was a little early to jump to 1 nap, my DS1 wasn't on 1 nap properly until probably about 16mos! But with a toddler at home as well, I kinda pushed him so that we could get out more, and he's been doing really well with it.
So he does 1 nap on the mornings that we have activities, but if I'm home in the mornings (which isn't often!) then I'll try for 2 if he'll take it.