It's a bit crisper than equivalent glass, but will also fish a WF5 very nicely.
A friend who came from Silaflex glass, loving his 7'er, bought the same Phillipson cane and can't put it down.

from my experience, most venerable glass rods are slower than cane. In fact, the equivalent bulk modulus of bamboo is higher than E-glass, and about the same as S-glass. My Quiet Loop VF805 is probably the most bamboo-like glass rod I own.
The fullflex is a sweet rod. I hope you're enjoying the Featherweight. I still think of the rod fondly but couldn't justify keeping 3 MF70s.

Merriam-Webster defines venerable as "calling forth respect through age, character, and attainments; or conveying an impression of aged goodness and benevolence". So for our forum, let's define venerable glass as older than your humble administrator, yet still a good fly rod. That would include rods from the 40s, if you can find them at all, and the 50s, if you can find good ones.

Given that, I agree that "most venerable glass rods are slower than cane". In my opinion, venerable glass includes the early Heddon glass rods, both painted and clear coated; the Conolon Fan Wing and Citation; the early, lighter weight, Silaflex Medallions; and the shorter, softer Actionrods. While I haven't cast as many 50s era cane rods as bulldog, those I have handled were quicker and less limber. It wasn't until Phillipson developed the Eponites that good glass had a crisper action.

Tom

hey GWW, are you referring to the "faster than" or "older than" definition here?