bill, I am pretty close to being convinced that the LD guys just hit it farther. This noted, even in one of your links there is the following text regarding that three ball competition at Kapalua:
“I’m going with the big boy,” said Sadlowski, who was carrying four drivers in his bag this week. He adjusts depending on the conditions. All the drivers are Adams Speedline 4064LS. The “big boy” has a 6.5 degree loft and the shaft is about 47 inches. - See more at: http://www.weiunderpar.com/post/sadlowski-lets-it-rip-throws-caution-to-the-wind#sthash.4F1V7C9H.dpuf
From the text itself we can see that Sadlowski talks about using a 47 inch driver, so to me that is almost assuredly a longer driver than the one used by Watson. Now, it may not have mattered one way or the other as Sadlowski may be able to outhit them using any same club comparison.
Final thought. IMHO, and this is a variation of my original thesis, if you put a typical LD guy out there (perhaps not Sadlowski if he is truly a scratch golfer, but say one of these LD guys whose true handicap might be something like a 15) on a tour course with a guy like DJ, or Watson, or Garrigus or McIlroy or Mickelson ...etc. and you have 14 holes that are par 4 or par 5, how many times will the LD guy be the long ball in the fairway? I believe it will be less than half the time simply because the LD guy won't hit many tour size fairways, even if he dials down to 45 inch clubs. The pro won't hit them all either, but he'll hit 7, 8 or 9 out of 14 while the LD guy hits maybe half that many. The LD guy might be the longest opn each fairway he hits, but I am guessing that if he hits a 45 inch club then at least once the pro will be longer even if the LD guy hits the fairway. I concede in advance that this is a slightly different thesis that takes accuracy into account and not just pure distance. And, as noted above, I am pretty close to just waving the white flag on the distance question as a stand alone issue. I'd still love to see them all hit the same club and see what happens.