The source is a reliable voice in jazz promotion in NYC, currently working the new Joey DeFrancesco with Jimmy Smith CD. She wouldn't blow a false alarm. I must say, I'm surprised that it hasn't hit the wires. Her email arrived around 5 PM eastern.
I'm not surprised, if it's true, that it has not hit the wires. Jimmy Smith doesn't get any respect for his absolutely enormous contributions not just to jazz but to organ playing, keyboard playing in general, and music as a whole.
I hope it's not true.