I've not met Chet Williams but for many years, I have greatly enjoyed his original and renovation work in Texas. Based solely on that work, I think that he may be amongst the most unknown, underrated gca working today. Off the top of my head, Rock Creek, Summit Rock, Whispering Pines, Houston Oaks, and The Covey are all courses I'd gladly play on a regular basis.
Re: The Covey, I've played all the top Texas courses, most in the consensus top 25 numerous times, and I have no issue with its GD selection. I have also played the vast majority of GD's top 50, but only one other candidate course in the survey. Based on the magazine's criteria, I'm good with the result.
As to the aspersions made against GD, I can only say that in my nearly 25 total years as a rater/panelist with three different publications, I've not experienced or observed the bad behavior cited. I know a number of participants in the ratings for the three major publications (GD, GW, and GOLF) and all seem to take their responsibilities seriously.
Texas golf has always gotten a short shrift on this site. I think a lot has to do with mostly inferior aesthetics, poor soils, rugged terrain, and often unfavorable climate. Many here were hoping that with the influx of money and top shelf designers, the PGA courses in Frisco would start to reverse the perception and perhaps get a foot in the door in the "world class" category. Alas, thus far at least, this has not been the case. Perhaps The Covey will achieve that recognition. In addition to Chet's fine work and the superintendents' (plural) care and attention to detail, the club has one other trump card: an owner who enjoys golf and has the understanding, means and desire to make it the very best it can be.