Guys I've found another strong connection between RJ and Ray Haffner.

Look at how Ray Haffner claps on Cho's shirt:
http://www.youtube.com/watch?v=ZKWkOauew4A (0:27-0:28)

And then look at RJ when he claps at PJ's shirt at season two finale:
http://www.youtube.com/watch?v=ns_DWnqrEdI (2:10-2:11)

Amazing, isn't it?