Posted before...

Look at Google analytics (new visits) results cross-referenced against company dates (drill results, announcements, volume surges, etc...)

Also look at the increased number of posts from 'nefarious' sources during these periods. This is the info new and 'googling' investors read.

While you cannot exactly correlate an exact ratio of the impact, my statement is not conjecture. Individuals make a good living of these sources of information (same ones referred to above).