Yeah, if you're getting it from someone and not growing it yourself, there's no point in worrying about the name. As already mentioned all over this thread, they're probably lying anyways.
The strains that actually do have the name "kush" in them can be great. I've been growing
http://www.herbiesheadshop.com/barneys-vanilla-kush-feminised-seeds-2414 for a couple years and it's always amazing.