Yeah I've seen the same with FIOS. The door to door kid said all kinds of nice things but I asked him to leave me some papers - which contradicted most of the great things he told me! Like the free forever DVR was actually free for 6 months, then $20/month.
As for Dish, I'm not even sure what "the basic plan" is. They have quite a few. Definitely worth looking at the line ups before signing up.
Today it was some kid from an exterminator company and apparently ants and spiders have been spotted in my neighborhood! That guy really made bugs sound scary.