Another day, another take on Amazon and Apple duking it out in the tablet market. The data comes from NPD’s DisplaySearch wing, and the results don’t come as much of a shock. By their count, Apple is still sitting at the top of the heap, accounting for 59.1% of the tablets shipped in Q4 2011 while Amazon is sitting pretty in second place with 16.7% of tablet shipments under their belt. At first glance, the results seem very similar to those announced by iSuppli this time last week — the only major shift is that iSuppli has book retailer Barnes & Noble slightly ahead of Asus.