Interesting how they (or maybe just you) chose to use a 2.9:1 reduction number. That seems much lower than what most folks (and even Pure themselves?) use.
My own 3PAR 7450 AFA gets between 1.5:1 and 1.7:1 dedupe at the moment depending on the data set. Used to be in the 1.8-2.0:1 range. 3PAR doesn't have data compression yet though. They first announced data compression at an event I was at in 2013, though taking a lot longer than I had hoped to get it out the door.