Nick have an very interesting point in his entry here: we effectively moved speech indexing/recognition techniques to a different domain with the GPU introduction. I couldn't agree with him more. With the performance gain we reported, many techniques in speeding up acoustic scoring becomes more or less irrelevant, since the bottleneck has shifted to some other areas. In this case, the grow itself.
This is clear from the performance matrix that I posted.
In other news, we are attacking the remaining "grow" part...