hmmmm.
interesting to know how different pple perceive groove.
personally, i see groove as one of the principles of music; a particular rhythm that has pockets to be filled, and if filled inappropriately it will obviously sound wrong, even to the layman, and when filled tastefully will display dynamics and form a GROOVE.
and everyone appreciates groove, be it the layman or even the musical idiot (which some might proclaim themselves to be, coz being reactive to groove is innate).
0.2 cents.