Clearly this is a valid method, to a point. Of course it isn't a be-all, end-all stat, but no one said it was.
Its always seemed to me the "attach rate" discussions have overlooked several key points:
1. Attach rate increases with time early in the console cycle (and decreases, though comparitively less, late in the cycle).
2. Skewing caused by pack-in games (either by counting or by not counting them) will become less significant as attach rate grows. 1 (extra game per console) / 3 (total games per console) > 1/11
3. Overall units sales, and unit sales rate, is more important than attach rate.
Also, Legend11, a haiku
Legend Eleven
You ought not act indignant
Lest your points are ace
"[Our former customers] are unable to find software which they WANT to play."
"The way to solve this problem lies in how to communicate what kind of games [they CAN play]."
Satoru Iwata, Nintendo President. Only slightly paraphrased.
