Other search engines may indeed be relevant as activity has surged in China and I don't think Google is their preferred search engine.
Also I'd take a look at client downloads on Source Forge, they have shown past correlation with hype indicators as well as price.
Here is a link to a download chart
http://sourceforge.net/projects/bitcoin/files/stats/timeline?dates=2012-01-07+to+2013-11-13I don't know if their are other download sources that might not be tabulated here but it seems to confirm a degree of market saturation, most people who would go and try BTC because of the current level of media coverage already did so in April of this year, as current media coverage is about comparable to what occurred earlier this year we should not be surprised that the effect is not drawing in new people, it generally takes a much stronger signal to reach the next level.
The conclusion I think we can all make is that BTC markets CAN shoot up to multiples of prior valuation with or without a similar boom in participation. Rather then new market participants driving the price up by their entry it is simply the current market participants driving up the price between each other. Obviously their are always new participants and Chinese seem to be experiencing a flirtation with BTC but I would expect it's actually effect on the number of market participants to be mild, we already have near saturation of the English speaking world and while China is huge so is the English speaking world so were at best going to see a doubling of participation were as in April we saw it expand by an order of magnitude.