Haha people who custom tune their vehicles look down on the generic programmers and call them "canned tunes" so I took it a step further and called them "canned tuna."
The generic ones are for your vehicle's make, model, and engine but not YOUR specific vehicle via a Dyno. Still helps though. I bought the Hypertech for my S-10 and it has a premium octane setting that I don't exactly know what gets changed, plus tire diameter for keeping the Speedo accurate, adjusting shift firmness and shift points, etc.
It changed my truck from that typical Chevy pushing-a-wall-of-air feel to a sprightly little pickup.