Coldbear, I'm not surprised that a TR course go into this in detail, as there just isnt enough time, but you can find that the escape plan is based on the complete descent profile and not just your ability to immediately get to 10,000ft. The profile that i list above is actually the profile that Airbus believes will give you the greatest distance for the 22 minutes oxygen.
I have no problem with the initial emergency descent profile, be it to FL290 or 10,000 feet, i'm more interested in knowing if it desirable that after leveling off at FL290, and just about getting some form of normality back into the passenger cabin, you then initate another max rate descent. Personally i would prefer to see a fast rate of descent without airbrakes, and adjust the depressurization profiles accordingly.
Mutt