More from comScore: The firm believes 46% of Amazon's (NASDAQ:AMZN) Sep. unique U.S. visitors...

More from comScore: The firm believes 46% of Amazon's (NASDAQ:AMZN) Sep. unique U.S. visitors relied on mobile devices, and that 17% were mobile-only. For eBay (NASDAQ:EBAY), which is predicting $10B in 2012 mobile transactions, those numbers were 42% and 18%. AOL came in at 39% and 12%, and Yelp (NYSE:YELP) at 48% and 30% - the latter number backs up the notion of Yelp as a mobile play. Pandora (P +7.4%) came in at an eye-opening 81% and 62%, with total U.S. visitors at 59.9M; some think those numbers contributed to today's rally.