If by shared you mean the 2.5gbps fibre link then that is only to the exchange as far as I'm aware.
Your connection is then handed over to Wholesale's backhaul network where it would still be susceptible to any peak time traffic "congestion".
Without running a speedtest you'd never ever know that your speed was "only" 150mbps.
Use the internet for whatever and don't become a speed obsessor.
Yeah, its not an issue, I only started to notice it when a download on my Xbox One was only getting 4Mbps (same as my ADSL2+ connection), did a speed test and saw 100 to 170Mbps was lost.
So I assume the Xbox Live network is also very congested at peak times

, that's fine, I will download those when their network is better.
But yeah if it was only on the 2.5Gb fibre link to the exchange that would of been great LOL.
Still loving the latency though, 3 to 5ms
Paul
BTBroadband - Infinity 4 - 310Mbps (down), 31Mbps (up)