No problem 57, it's hard to keep track of all the different technologies. I'm pretty sure Bell IPTV also gives priority to IPTV over internet traffic. I do recall reading the thread which seems to confirm that, although running a torrent while doing a speed test skews the results.
MTS allows the PVR to record 2 HD streams and 1 SD stream simultaneously. Using my own rough estimates of 10 Mbps for HD and 3 Mbps for SD would give 10+10+3=23 Mbps which would fit into the bandwidth allocation.
The rule of thumb that MPEG-4 can be up to twice as efficient as MPEG-2 would mean that 10 Mbps MPEG-4 IPTV would be comparable to 18 Mbps MPEG-2 ATSC OTA TV.
In looking up the spec sheet for the MTS encoder, I noticed that it "provides a full 30–40% compression gain over the first generation of DSP-based MPEG-4 HD encoders". This may explain why the actual number of HD hours is higher than the original estimate.