On another point raised elsewhere, as has been noted other members of the LG family do have services with higher upstream speeds and in a number of cases downstream speeds.
VM are delivering what they need to in order to compete with BT's widely available services. I say widely available specifically.
As soon as G.fast goes commercial they will leapfrog it, which is why they are delivering 20 channels to areas, on the average 1Gb of aggregate capacity is good for 500Mb downstream retail services and there's no urgent need to even deliver that, 350Mb would be fine.
On the upstream side VM are as I mentioned in the midst of an ongoing network upgrade programme. Previously when they went to a 10:1 upstream ratio back in 2010/11 they had to rebuild some networks as they were upstream bandwidth limited, only 25 MHz capacity total there and not all of that usable. They're now in the process of dealing with areas with 35 MHz and 45 MHz upstream, upgrading to 80 MHz, which can be switched to 199 MHz with a module swap.
Eventually the entire network will be 1.2 GHz plant with upstream band of 5-85 MHz, going to 5-204 MHz when required, downstream going up to 1.218 GHz.
Downstream channels are being freed up by a combination of going to IP-everything bar broadcast and moving to MP4.
When needed DOCSIS 3.1 can be released however there's no driver right now. DOCSIS 3.0 alongside node splits will deliver 1Gb retail.
Other than that other LGI territories have to deal with far more aggressive ILECs that are deploying gigabit FTTB/P and/or planning deep fibre G.fast. VM have no requirement to upgrade more rapidly than they are and have a smooth upgrade path following cable best practices and standards.