I'm very interested in this as well. I've ranked a few properties well for google trends but have yet to see significant traffic. (The most I've gotten was about 400 views)
Obviously all of the trends have a big spike in traffic, but how many views/day are these trends getting? Is there any way to tell?
For example, is going from 0 to 1000 searches a day enough to classify as 'volcanic'? or 0-10,000? more?