Yep - actually Folkestone to London Terminals. Folkestone to Stratford is 42 minutes then I have 30 minutes bus/train/walk from Liverpool Street to my office making 72 minutes in all. The quickest realistic commuter journey journey via classic to/from Cannon Street AT THE MOMENT is the 17.44 to Folkestone which involves a 6 minute walk to Cannon Street (15 if you want to guarantee a seat.) and a change at Ashford which is 104 minutes in all.
This is the only "commuter time" train with this stopping pattern, so all others (either up or down) will be longer. Obviously next week when the times change and this service becomes an all station stopper (as opposed to Sevenoaks, Tonbridge, Ashford) this journey will take longer.
Guess it depends where you travel to at the London end, but this knocks 5 minutes off going into StP then tubing it to Moorgate and walking to/from there, with no extra cost.