nothing wrong with upto.
i understand that the product i subscribe to will provide a speed upto x mb/s which is Dependant on my line quality.
All the xDSL providers are in the same boat and will provide the same speeds as the limitation is the access line to the customers house from the local cab.
i can buy:
adsl up to ~ 18mbs
vDSL up to ~ 50mbs
vDSL up to ~ 70mbs
VM 50/100/300 mbs
whilst VM's coax technology ensures they can guarantee their access speeds to all, the others are different and variable.
the public just needs to know there are different tiers of access speed which is dependent on their individual line characteristics. nothing more nothing less.
Its like a choice of toll roads offering different max speeds with the car being the connection rate. A crappy car won't be able to reach the top speeds in any of the roads, whilst a decent car will on all of them.
the only fix is to buy a faster car. or in BB terms move to FTTP or move the cabs closer to peoples homes and continue to use copper as VM have done.