Since I pay for 12down/2up service, this is obviously with speed boost.
Though, I can usually spam my connection with netflix to burn up my speedboost and test again immediately to see my "real" speed. It seems to have a lot to do with network congestion, on peak hours I usually "only" get my rated 12/2 and no speedboost, but at way off peak hours I get a lot more bandwidth than I pay for.
Modem stats:
SNR: 39.5 dB
Received Signal Strength: 0.1 dBmV
Bit Error Rate: 0.008 %
Which of course, is all stupid good.
Funny recent story:
There was apparently some kind of node issue, that was impacting down speed in my area. Apparently nobody else does anything more than browse the web on my node, because there were no other complaints.
I was getting like 0.5Mbs down (but still 2-3 up), which was unacceptable for my service level. I was still % 100 reliable though. No packet loss, good signal, no modem disconnects.
So I called them, and they sent someone out (universally expecting that I was just a dumbass).
Exact quote from the phone rep: "I've never seen a modem with signal that good having a problem."
However, since "my internet is slow" is
almost always just user stupidity, the tech had a hell of a time getting their higher ups to listen.
I already had great cable signal because I terminate unused connections in the house and also that my modem is literally about 4 feet of fresh cable away from the master splitter. It's like a cable guys wet dream. Anyway, so his superior is CERTAIN that my computer is just slow (i7920 & HD 5850, LOL). The poor original tech was actually told to run a brand new drop off the pole for me, because it couldn't POSSIBLY be the network. I also got a brand new not-a-crappy-surfboard modem.
After 4 independent visits from 3 different techs, it finally got pushed up the food chain (by a "lead" tech that came out). A day later, I was rocking at full speed again. He said that they wouldn't tell him what exactly, just that "there was a problem."
So they ran me a new drop, gave me a new modem, used what I estimate to be about 8 hours of time on site (plus gas and drive time), and credited me $20 for not fixing it on the first visit.
For something that had absolutely nothing to do with conditions on site.
EPIC FAIL for comcast.
EPIC WIN for me.