Phil,
I would say generically that the above statement is correct. Adding a turbocharger to an engine does usually result in elevated midrange torque and a sharp drop in top end torque making turbo engines feel unrevvy.
A classic example is the R5 turbo or fiesta turbo. Both these cars feel breathless after 5500rpm, whereas their N/A equivalents (e.g. 205 1.6gti etc) are far more revvy.
However turbo engines can be made to rev, (allthough never as well as an N/A) but it's always at the sacrifice of low rpm turbo response.