Nothing new there; **** Walker said the same thing thirty years ago. It's even more relevant today as everyone seems to think you must use these dreadful large arbor reels which weigh far too much - I have yet to see one that takes a #7 line under 6 1/2 ounces - and even then you'll be paying a small fortune. Get a cheaper one and it will be at least 8 or 9 ounces. Stick that on a carbon rod weighing 3 ounces and it is no suprise the rod's casting action is destroyed.
Ignorance of this fact is fine if you take the view that is is only the individual who suffers as a result; unfortunately demand for large arbor reels is such that the manufacturers have to make what people want. You just try and get a decent lightweight traditional style fly reel these days - in other words a step up from the Rimfly/Orvis Clearwater models - not that there's anything wrong with them.
Orvis are the only one to my knowledge who offer sensible rim control reels weighing under 5 ounces (which is still a bit too heavy) with their Battenkill and CFO ranges. Hardy only make one now - the Lightweight - and that only in small sizes; fine on the streams, but useless for small stillwater work - which I am prepared to bet is the biggest market sector these days. I am fortunate to have one of the Marquis reels - in my opinion probably the best general fly reel ever made; it holds a DT7 floater and fifty yards of backing, yet weighs under 4 1/2 ounces. Perfection.
I suppose someone will point out that a large arbor holds much more backing, so when that fish is heading for the horizon you have enough in reserve, etc etc... Well, that's rubbish. For small stillwater fishing fifty yards backing plus a flyline is ample. In all my years' lake fishing I have only once had a fish get all my flyine out, and then only because I had twenty odd yards out when I hooked it. If you fish reservoirs you can use a shooting head and flat nylon backing; a normal reels will hold two hundred yards of 20lb nylon, plus a twelve yard #8 shooting head.
What about speed of retrieve you say? What about it, say I. Even a five inch centrepin wouldn't allow you to wind in fast enough to keep up with a trout, so why bother trying. Strip the line in by hand if you have to.
Of course, if you really want to be able to wind in as fast as a speeding rainbow, you could buy a big pit fixed spool and put your flyline on that. It'll really bugger your casting up, but if you're using an oversized large arbor reel already you're presumably not bothered about that, are you?