I have been given the 150meg increase now and thought oh yes here we go.
Ran a few broadband speed checks to see I am very lucky to get anywhere near 50 meg and 10 meg up and those figures were at around 7am in the morning.
I know you say "upto 152" but this is a complete lie and a joke. I used to get peed off with Sky's broadband speeds but at least they don't false advertise about speeds. Something needs done about this as my speed is well under 1/3rd of what you say I can get.
I have ran several tests at different times of day and night and the most I can honestly say I have had is about 43 mbps.
It really is a mystery why its so slow.
There's no mystery here and it's rather unfair to blame Virgin. The speed you'll see in practice is limited by the slowest part of the link, and in your case that's the WiFi connection. 43 Mbps is a normal speed to achieve on 2.4 GHz WiFi - this technology isn't capable of much more. As has been suggested, you'll need to connect a PC with a gigabit Ethernet interface directly to the SuperHub with an Ethernet cable to be able to measure the real maximum speed of your connection.
This is an example of the infamous "up to" qualifier! The duplicitous advertising industry discovered some time ago that a significant proportion of the population interpret "up to" as meaning "what I should expect", whereas the plain English meaning of "up to" is any number between 1 and the figure specified. Which of course, makes any "up to" advertising rather insulting.
A rather more honest advertising yardstick would be to publish percentile figures: 99% of customers achieve this (low) speed, 90% achieve this (slightly higher) speed), 80% achieve this (higher still) speed, etc, etc, to perhaps 1% of customers achieve the maximum speed. It's not likely anyone will do this unless the ASA makes them.
VM is more honest than ADSL suppliers in that it's technically possible to achieve VM's advertised speeds whereas it's impossible to achieve headline ADSL speeds. I'm one of the fortunate customers who usually sees a genuine 150 Mbps download speed but I don't know how common this is.
Just as a matter of interest, are those speeds with your computer connected directly to the VM Superhub via an Ethernet cable? If not, it would be worth trying that to exclude other factors that may be slowing data transfer speeds.
Have you tried a speedtest when directly wired to the SH? If not then get that done as that will hopefully show what the max you'll be able to get is. Be warned though, if the network card in your laptop is on a 100Mb type then you'll hit the max at around 90Mb but you've said it's a fairly new laptop so should hopefully have a Gigabit network card.