Jump cuts have their uses, like all things. Different editors have different philosophies, but general practice is to cut in such a way that they don't feel like jump cuts. Certain editors and directors, however, use jump cuts to disorient the audience, to manipulate time, and to suggest connections between otherwise disparate things.
Me personally, I usually cut as close to continuously as possible, and only ever use jump cuts as smash cuts - really punchy cuts that usually underscore a certain point or make for a comedic beat (e.g. "No, I'm not going to get in the car with you!" Jump cut to them in the car).