I have noticed that as well, it must be a side effect of modern engines, particularly diesels, that are programmed for massive low down torque, and a quest for minimal fuel consumption. My Vauxhall does 38/1000rpm in top. It rarely goes over 2000rpm, unless I am trying to clear the DPF.
A Triumph 4 sounds great up round 6000k, a Triumph 6 sounds even better.
Give it a go I say, you won't be disappointed