One problem with the way he did it was that he was comparing the same location, which I appreciate sounds like a daft thing to say.
However, anecdotally I would say the most common form of the tree draw distance bug appears to be the latitude related draw distance issue… so him comparing a before and after of two pictures of the same latitude misses the point of that specific complaint.
Really they need to look and compare the tree draw distance near the equator and up at higher latitudes.
Part of me also wonders if perhaps the tree fix they rolled out for SU4 somehow got missed from being rolled into the WU5 branch.