Not sure I agree with the last part of the article about the engine being part of the reason for BMW's apathy. BMW doesn't seem to be hyping up the ALMS RLL team lately either since they switched to the Z4 GT3 and that car is powered by a very current P65 engine. It seems to me that BMW is simply directing all of its factory effort into DTM right now (with a lot of success I might add).
Speaking of ALMS, they are merging with Grand Am starting next season and that's when things get interesting. Not sure how the unibody and tubular chassis GT cars will break down. Plus DP is going to have to be merged with LMP2 somehow.
DTM is headed to the US too. Lots of potential for BMW advertising tie ins.