I'll be curious to see what CGC has to say, but I won't be surprised if the response amounts to "plausible deniability," which would be something to the effect of, "Well, we can't tell for sure which printing is which, so we treat them all the same."
Never mind the fact that the collecting community cares about the issue enough that it's been a topic of discussion on the boards for fifteen years and counting.
Never mind the fact that CGC could have confirmed the percent distribution of the different versions by now if they had chosen to collect and analyze the data.
Never mind that they could note which version of the house ad a copy contains without committing to endorsing that copy as a first edition or reprint.