TV vs Internet Advertising

From Progressive Grocer and GMA, on a new report:

' ... Early results of studies from comScore, in partnership with dunnhumbyUSA, indicate that advertising on the Internet may boost retail sales better than television-based campaigns do. Online campaigns with an average reach of 40% of their target segment grew retail sales of the advertised brands by an average of 9%, while TV ads provided an average boost of 8% ... '