Spoke:
I understand your logic (that at the 30 MHz profile), speeds are higher at shorter distances (and that comparison at shorter distances should be with the 30 MHz profile to 30 MHz profile.
But, if Carriers are mainly looking at long loop applications, they would not use the 30 MHz profile (as speeds drop off signicantly with greater distance (as the article stated beyond 700 meters).
So, if 12 MHz profile is the profile of choice for longer loops it appears be a valid point of comparision to compare 12 MHz VDSL2 vs. Cupria (presumably at 12 MHz too???).
I may be incorrect, but the real value in the USA is what technology can transmit the furthest and the fastest without deploying fiber optics.
It remains to be seen whether it is Cupria as RIM has not released any results of field trials (based on the FPGA chipset version).
But, from everything that I have read VDSL2 DMT (in any profile) up to 30 MHz has not been able to provide 20-25 MBps of throughput at distances beyond 3-4 thousand feet which means carriers must spend a lot on fiber to shorten the copper loops.
