Wow, the slowness of Desqview BBSes is something I haven't thought about for 30 years, but yes, you are right. I remember calling into a Roboboard-based BBS that switched to Desqview and seeing the characters type out so slowly on my screen. I think the SysOp quickly moved away from it.

I ended up running OS/2 Warp when it came time to run my own BBS. :)