I did my updates last night. For 3 pc's over a Gig. Averaging that had it been in the daytime and on a 10 Gig monthly allotment, that would have been 3 days worth of use, so it is worthwhile to do it in the free time or bonus bytes, whichever applies.
On the 8.1 machine there were an additional 2 recommended optional updates amounting to about 160 MB. The first one had to do with making the critical 18 part update work properly on an 8.1 machine, so in my thinking should be a required download for 8.1 as well.
The installing of the critical 18 part update was quite time consuming and there were a couple reboots involved but everything was successfully installed. I always create a restore point manually prior to these updates, even though windows should do it automatically.
Also a gigantic update for Adobe Application Manager. Most folks don't have this unless they are into Photoshop, Lightroom, and other Adobe products, as I am. That would really wipe out an allotment and there are always other software updates going on in the background.
The bad thing about this night updating that can't be scheduled is that so many folks work or have other obligations so they really can't take advantage of the free time marketing strategy that they read so much about in the advertising.
What is your point? Windows update does use BITS but setting it for 3 AM or another time does not make it start the download at that time.
Folks experiencing 200-500kb speeds should not see downloading commence during the day if they are constantly using their computer to maximum capacity but when the coffee cup needs refilling the computer often becomes available during the day and the incomplete download of the update picks up again.
At least that's my understanding. Please tell us all how you guarantee that updates only start during the night zone and never commence during the day if they or numerous others that are on the BITS set up by Microsoft are in the rotation pattern?