I agree that most people have no idea what USCSA or MEC etc mean, whereas they do know what Division III means, but that is precisely my point - UB is not Division III, and hence saying D 3 is telling them something that is inaccurate. It is indeed convenient, but it is also entirely misleading. For example, almost all NCAA Division III teams have their races scored for USSA points (and hence have a USSA Technical Delegate present to enforce various rules & regs), but my understanding is that MEC Empire still does not.
I never meant to imply that varsity status automatically means a better skill level than club status. However, the level of competition at the MEC Empire Division is nothing like the MacConnell Division (mainly Division III schools) of the ECSC or the all-varsity EISA (mainly Division III).
Also, look at the top 11 teams at the USCSA national championships: all varsity. After that it's almost exclusively club teams from geographically challenged parts of the country.
Another example is when the MEC Adirondack Division comes to the ECSC regional championships at Waterville: typically only NCAA Division III Clarkson stands any chance of qualifying for nationals. Ditto for the teams from the ECSC club divisions - only NCAA Division II Green Mtn College stands a chance.