As I write this, I am waiting (and waiting and waiting) for the Google Web Accelerator Download to actually happen.
It's an interesting idea. What I'd like to know is how often they refresh the cache? How will it know when my blog is updated? (And, will it affect counters? I was hoping to hit a million in a year or two…)
Update: I've saved 2.2 seconds! Whooo! (And given up substantial privacy about my browsing habits. What will Google be doing with my complete http: (but not https) clicktrail?)