Global Equities Research analyst Trip Chowdhry made a contentious claim Friday that Apple's back-to-school promo was showing signs of being much more effective than Microsoft's. Despite Microsoft giving away free Xboxes with PCs, research in an investment note from GER showed that 80 percent of incoming students were buying Macs, not Windows systems. Trends were up for online-only colleges and universities, while returning students later into their studies were very interested in getting iPads, Chowdry said in AppleInsider's copy of the note, which didn't mention th