Indeed true. Returned from vacation with 9 lbs. of coffee from assorted sources/locations on the Hawaiian Islands. I was little concerned I would be stopped by the TSA (for unknown roundish objects) or Hawaii agricultural inspection (for coffee smuggling) -- but, alas, no problems. I think you are allowed to travel with 12 ounces of ground coffee without removing it from your carry on for inspection. I was travelling with whole beans of course.
No doubt those TSA agents would have felt compelled to make lots of coffee in order to verify that every package was in fact as it was labeled
And it will be interesting to hear the details of what you bought!