Around here, I believe it is just the opposite. But, it all depends on the person, place, and community.

15 MPH... cut through town. If the MUPS go where you want to go, they're the BEST way to go.

I'm not big on riding over 25 MPH on the MUPS, except for a few sections, but there are quite a few places where a vigilant rider could push it up to about 20.

Yeah, if you're out on a training ride, and want to average 25 MPH, then find a good country loop.

One of the things about the good MUPS is they avoid all the stoplights/stopsigns which seem to snag me far too frequently. So, unless I'm pushing it hard enough to hang with the cars, the MUPS are avoid all the waiting at lights, and can save a significant amount of time.