Some thoughts from glass fans:
New HARDY GLASS RODS - Fishing with Fiberglass Fly Rods - Active Discussions - fiberglassflyrodders - Message Board Yuku
Hardy Glass - Fishing with Fiberglass Fly Rods - Active Discussions - fiberglassflyrodders - Message Board Yuku
Hardy introducing glass fly rods - Glass Tech - Active Discussions - fiberglassflyrodders - Message Board Yuku [post #95 for the 8'#5]
I have a dozen glass rods from 50 years old to rolled last month, #3/4-#9/10, 5'9" - 9'3". I have an old hardy (love it) but not one of the new ones.
They're all in use and fun to fish but a very different casting style - you really have to get languid and pay much more attention to good timing and adjusting to the pace of the rod to get real distance.
Don't seem to like snap stops and pushy casting strokes that you need to get the best from graphite, nor aggressive WF tapers (try a DT sylk). Most graphite users who have never fished glass will wiggle one and just not 'get' the appeal. But when you hit the sweet spot and they seem to suck up line and cast themselves effortlessly, and they are far better fo playing fish and protecting light tippets (IMHO).
I also use graphite regularly it takes a little time to adjust between the two, especially at first. And i also find very short rods (<6'6) harder to cast well, whatever they're made of.
FWFW I prefer glass to graphite for short-med river work with lighter flies, and also fishing streamers and for carp.