Again from WaPo:
reports that, according to independent estimates, few high-value targets are being hit successfully by U.S. drone strikes in Pakistan, despite a sharp increase in strikes last year. The report says 118 drone strikes in 2010 killed an estimated 581 militants, only two of whom appeared on a list of most-wanted terrorists. CLS Fellow Peter Bergen is cited in the report as suggesting that “data on the strikes indicate that 94 percent of those killed are lower-level militants".
Link:http://www.washingtonpost.com/wp-dyn...l?hpid=topnews

One does wonder if the ISI-provided intelligence, pre-Raymond Davis, which has previously been reported as the main source for targeting, has been accurate and if the motives have been clear.