yup it's true... haven't got any grit weed myself, but alot of people here have... it's pretty easy to tell apparently all you gotta do is handle the buds (like breaking 'em up) then stick your finger in your mouth and if you feel like you're chewing on sand, it's grit weed.

also, again i've had no experience with it, but LIP has said several times if you shake the buds, you can get rid of alot of the grit...

i'd suggest the method above before making any purchase, so you can know you're buying pure bud and not grit with it.