I would venture to say that Pat is taking a bit longer on his guitar parts partially because he hasn't been in "the mix" for a while. Glenn has had the good fortune of being able to tour, record and jam with some great musicians on a steady basis since his full-time "return" to the biz. So, he's regained his "edge" , as it were.
Pat's main focus for the past several years has been on recording and producing other artists, with an occassional guitar part thrown in. His work on the original Hughes-Thrall album was ground-breaking for its time, and Pat was voted "Best-New Talent" by Guitar Player Magazine back then. He has a big rep' to follow-up. I would imagine he is working to make sure that the guitar parts on HT2 blow people away again!
Just my humble opinion....