There is a small resurgence of interest in fiberglass rods on the water in the last few years and it may have more practical applications than you may think.
Just like how in modern day fly fishing rod materials are pretty much dominated by graphite materials there was a time when fiberglass controlled the world. My dad tells me a story about once a year when he was fly fishing in the 70's with my uncle and looked downstream at his brother and admiring his smooth loops laying out 40' or so of line effortlessly. At the end of the day he remarked at how good of a caster my uncle had become. My uncle responded that he had not been practicing his cast at all it was just his new rod made of space aged fiberglass! In those days the jump from bamboo rods to fiberglass was quite the game changer.
I am still a firm believer that practicing your cast will take you miles farther than a new rod however there are many things you can learn about your cast with different rods made of different materials. The first noticeable difference with glass is that it is super slow action especially compared to graphite, for the most part this is a generalization without getting too technical. It may seem to my ADD generation that a slower action rod is more difficult to cast but in a way it will cause you to slow down you stroke and examine imperfections. Lot's of people overpower rods, myself included, but the physics of a fly cast require a constant acceration which i think is easier to feel with a slower rod. Plus casting slower can be nice and relaxing, take the time to let that back loop form and casually bring it forward and let the rod do the work. Since fiberglass is sooo soupy slow it really wont respond to overpowering but when you give them the time they require you will see a stunningly beautiful loop lay out in perfect harmony.
A lot of guys really like glass rods for small creek fishing and tossing dry flies because they lay down line so delicately and offer a nice stealthy approach. They make a lot of sense for playing big fish on really light tippet as well. With all that flex you get to use the rod's bend as your shock absorber and protect a 6x tippet.
We are thinking of doing a day on the spring creeks in the next few weeks using only glass rods with click and pawl reels lined out with double tapers to put them to the test. Care to join us?
A great option if your thinking about getting into a glass rod is the Echo Glass series. A beautiful rod in the sub $200 price range these are perfectly balanced high quality rods that can help ease your casting into a meditative rythm. Come check em out at the shop and we can hit the casting deck on the roof so you can feel the difference. Also really fun in the two handed switch and spey models!!