Due to my past ARM Linux benchmarking on Phoronix that they have followed, their use of the Phoronix Test Suite, and my experience with Linux benchmarking and performance testing in general, I was invited over to MIT to help with this 96-core ARM build after having collaborated with them for a few months. This cluster / super-computer was built around 48 PandaBoards.
The bulk of the PandaBoards were not the ES model (I brought my collection of PandaBoard ES models as back-ups for the PandaBoard nodes that failed), but just the vanilla model. The non-ES model packs a Texas Instruments OMAP4430 with a dual-core 1.0GHz dual-core Cortex-A9 processor. The GPU and CPU of the PandaBoard ES with its OMAP4460 are at higher clock speeds, but aside from that it is very similar to the OMAP4430 model.