In July 2009 I would say there was between 15-20 UK and southern Ireland couples. The hotel was full at the time apart from 1 building that was having renovation work carried out.
There was also an Italian couple for around 3 days!
I like the fact there are only a few of us at the resort, 9 times out of 10 you are treated as a bit of a novelty which is funny. My bf and I were 21 on our last visit, unmarried, not engaged and not living together! Something that was also a talking point. This is how we were introduced to most couples by the friends we made. I was quite amused!
By no means are you ever made to feel like an outsider. everyone at CN is soooo friendly. It doesn't matter where you are from.