Most of the decals that you get I believe are silkscreened, especially where there are several kits being produced, its one of the quickest ways to mass produce. I used to work for a sign company and we did a lot of silk screening for some large camper manufacturers.
One type of decals that I used recently were laser jet printed; the ones I used for the United Airlines logos on the 787 were laser jet printed. They came on a solid sheet and required a lot of trimming around the decal. They are also really thick and it took a couple of coats of decal solvent to get them to settle down into the shallow recesses on the tail. There were also some silk screen decals, from what I have experienced, silk screen are of higher quality; but can be very brittle.
Others may have had other experiences, those are just what I've had.