I believe the RHO was supposed to be Q3 but it's now it looking like Q4 as you mentioned. Word on the street is that they'll be closing the factory for a 2 week retooling for the new trucks in July. We should see a jump in higher trim trucks late July/early August.
I've heard 2 weeks and 3 weeks. If it's 2 weeks and is in fact partially for retooling then this would be amazing news.