My son is refusing to nap now too if I ask him, but he almost fell asleep today and my parents stopped in and well, that was that. No nap.
He had a 25 minute cat nap in the car on Friday and went to bed later that evening. 8pm or so. Slept around 11 hours. Last night he slept 12.5 hours for the first time in his life! Right now he is in the process of going to sleep. So wake time today was 7:20am.
I can't believe how much easier it is without worrying about a nap. Of course things will be different next week as my vacation is over and we will be commuting home at 3:15pm every day! So, I am sure we will have some late cat naps to deal with.
So, all in all I am not worrying about day sleep anymore. I am doing quiet time after lunch. He has to lay down and read books with me for at least a 1/2 hour.