I have no idea, but if you do a little research you will see a post that specifically asked Dew "if we have been leapfroged" (paraphrased). His answer was "definitely not, but we had better keep an eye on the competition" (paraphrased). (That was in response to the March 08 PR. I have quoted verbatim his response to the February 07 PR.) None of the responses in March 08, (total of 2 as I recall) support your statement that, "He and others didn't think it was significant back then."
As a footnote, the March 08 PR came out a few days after the GTCB pps did its back flip from .70 to .50 and the infamous insider sales took place. At the time, no one could explain the drastic decline in pps. Coincidence? Maybe, maybe not.