IMO the answer is a resounding "yes", as long as the name is an acronym, has some meaning, or has some branding value. Things like "qqq.com", "pta.com" or "luv.com" being examples.
There's also still value in names like "zxq.com" to an extent, but i'd guess for domainer sales more than end user sales.
A good strong "lll.com" is proably worth anything from $xx,xxx to $xxx,xxx depending on its strength and value to the end user. Lesser lights i'd imagine $xxx - $xxxx.