Mark -
over the years I've found myself answering that question in two very different/distinct ways.
At times I've been sure that today's architects (as a group) are better than their predecessors, and that today's best are better than the best from the golden age. You have the advantage of being able to study and learn from 100+ years worth of writing and on-the-ground examples.
At other times, though, I've been sure that the primary/quintessential function of a gca is to route an 18 hole golf course, and that the most prized talent than any architect can posses is the ability to make the very most out of a given/natural site through his routing -- and that, in this regard/context, the golden agers were better than today's architects, if only because they had much more practice at it (and no other choice) in the days before massive earth moving equipment was readily available and ubiquitous.
BUT
If you asked me this same question today, I would probably type NA - not applicable, or neither answer. I just don't think it works the same way in golf course architecture as it does in, say, scientific research.
In the latter, you could not possibly have had a Hawking without an Einstein, or an Einstein without a Newton, or a Newton without a Galileo. We still might not say that one was 'better' than the other, but it is undeniable that the later ones very significantly expanded upon and enriched the work of the earlier ones. But as I say, I don't think gca works that way at all. No one today is "enriching" or "expanding upon" the work of his predecessors; but neither are Ross and Mackenzie necessary precursors to Coore and Crenshaw.
The principles of gca have always been there, and remain unchanged; and also essentially unchanged, from then to now, are the main functions involved and the many tasks at hand, and the varied challenges faced and different talents that are tested. Which is to say: I don't think you can say one way or another whether today's architects are better than those from the past, or not.