Last year, Volvo sales in the USA were a mere 26,000 units. Although a move like this may seem to be a vindication of HD radio, the Volvo customer base right now is too small to make much of a difference.
I'll admit, it's a start for the pro-HD radio people; but they need to save the celebration until such time as they can convince Toyota or Ford to do the same thing. Until then, it still comes off as too little too late.