I drive one of those. The recommended oil change interval is indeed 10-15K. Synth oil just lasts longer. That said, it absolutely does not hurt to change more often, and many of us, myself included, do a break-in oil change after 1.5-4K miles, then change the oil about every 7500 miles.Some cars are designed for longer oil change intervals, it's as simple as that. They have larger oil capacity, a more durable filter and so you can go longer between changes. For instance, my friend's BMW 330i takes 7qt of oil and the recommended change is 10-15k, depending on how you drive, the ECU actually keeps track of how you drive and tells you when it's time for a change.
The response on the VW forum was correct that it probably makes sense just to follow the recommended procedure, but incorrect that changing more often will actually wear the engine.