Great find! We need to do more to make people aware of this issue in any DI engine that has these problems. Rl_RS4 you are leading the way! Great work!
Haven't read all that site yet but the "use higher rpms" makes a lot of sense to me as a preventative measure. I have always believed that "lugging" an engine is bad for numerous reasons. The porsche flat 6, for example, loves to rev. and it seems to me that the garage queens that are taken out every once and a while to put around don't hold up as well as those that are redlined occasionally (after warming up of course).
In the 2.0 FSI world the heavier and slower EOS has had the most problems from what I have seen in terms of deposits. The average person buying that car is less likely to rev. it up IMO. Just an impression, no hard data to back that impression up. Also the DSG transmission, if left in "d" mode, is a short shift master. It's programming in "d" is designed to sip fuel. This may be contributing to the problem also. Note that in 's' mode it is the opposite, it shifts past the redline and lives in the upper rpm range.