Veritas were currently quickest - when I subsequently used them it took 3 weeks. Only writing this in the hope it might help others.
I know of other instances where cards have been issued in the same week as being applied for. Veritas in no way can claim to be the quickest as it is the background checking process which takes the time. Once a clearance comes in, cards are usually printed on the same day.
More advertising hype rather than fact.