New iPad figures from Gazelle suggest that owners of iPad 2 and iPad 3 models may be preparing to upgrade to the iPad 5. Gazelle told me that they are seeing five times as many iPad trade-ins as last year, with the trade-in rate increasing as the month progresses. Apple is due to launch the iPad 5 on 22nd October. Over half of all iPads being traded-in this year are the iPad 2 and 3 models.