Interesting - it links to an article about KB3172605 as "the cure" (with side effects if you have an Intel Bluetooth Wireless Network Adapter) so I guess some people may not have yet received the fix.
I got it back in mid-September. So Microsoft did the right thing as far as my machine goes.
Yes I recall that, however I do not have the Wireless Bluetooth...Sigh. However the Update (fix) I did run has significantly sped up the amount of time it takes now.
Maybe it was/is slow for those with wireless connections. I have no way of testing that I'm afraid.
That update should be on everyone's machine by now anyway.