It's called "puffing" in the law. Ask Judge Judy, she'll agree. It's done all the time. Car sellers say "used car has been driven by a little old lady no more than 10mph on Sundays only to go to church" or "these golf clubs are definitely going to let you stroke less" (or whatever the term is, I don't play golf), or this couch I am selling you "has barely ever been sat on."
puffing
n. the exaggeration of the good points of a product, a business, real property, and the prospects for future rise in value, profits and growth. Since a certain amount of "puffing" can be expected of any salesman, it cannot be the basis of a lawsuit for fraud or breach of contract unless the exaggeration exceeds the reality. However, if the puffery includes outright lies or has no basis in fact ("Sears Roebuck is building next door to your store site") a legal action for rescission of the contract or for fraud against the seller is possible.
Puffing legal definition of Puffing