Ok, so, early March, Comcrap finally upgraded my area.
My docsis 3 modem has 4 channels down, 1 up.
Still seems like oversell/use for my tier, but, meh, if they can guarantee I'll always have my current speeds, I'm ok with it.
I no longer have "power boost", but my top speed is consistent as long as the server can feed me.
I saw a regular here (krooks!) complain in another thread that it's difficult to get reliable speed tests due to various ISP's powerboost.
I agree.
Several applications are available for local machine speed monitoring, which can show the rate after boost cuts off.
One I recommend for personal use is
SIW, it can give you more information than you'd really want to know, and a whole bunch of info you do want.
(Free for personal, has 'newer' downloads for cost - I've been tempted to purchase it several times. Perhaps if it ever goes on sale)
Actual download sites that (usually) will download long enough to get you past speedboost.
http://testmy.net (use the automatic)
And, old fashioned large file downloading.
Unfortunately for me, the site's based in the UK I think..I lost some overhead going across the trans-ocean cables, but, I was still satisfied to see a good steady speed after 5+ minutes.
Your milages WILL vary depending on ISP and routing.
http://www.thinkbroadband.com/download.html(They even offer different ports.. some ISPs prioritize port 80 over others since it's standard HTTP browsing)
That site showed me I no longer get powerboost.
EDIT(Hmm, as of this edit, I can't get any of the files. Tracert shows high pings. Maybe it will correct itself. I've no idea what time it is in the UK atm.
12 58 ms 57 ms 57 ms xe-2-0-0.cr2.lga5.us.above.net [64.125.24.29]
13 61 ms 57 ms 62 ms ge-1-2-0.mpr2.lga5.us.above.net [64.125.29.58]
14 480 ms 689 ms * so-3-0-0.mpr1.lhr3.uk.above.net [64.125.28.65]
15 635 ms 727 ms 735 ms above-gw2.thdo.ncuk.net [213.152.254.53]
16 754 ms 738 ms 772 ms gi0-24-10-star1.core-rs2.thdo.ncuk.net [80.249.9.9]
17 * *