It is possible to get it to run great on the dyno and crappy on the street, but dyno tune isn't mutually exclusive from street tune. You can use the dyno tune results as a base since your WOT should be locked in, then you just need to play with non-WOT a little bit (AE and PE, mostly).
_________________________
'99 GTP, L36 bottom, XP cam, Headers, 3.29 gears, FWI, Powrtuner