[radioactivist]

This article and the discussed work was put out last December (see http://arxiv.org/abs/1512.02206). Scott Aaronson weighed in around that time; see http://www.scottaaronson.com/blog/?p=2555.

[daveguy]

The blog entry includes a reference to the HN discussion in the updates toward the end.

The previous HN discussion clarifies that google reports a constant (although large) increase in speed for a specific application.