I haven't thought about this much since 2011 [1] but I think what they've done in hardware is something previously people have done in software. It doesn't sound like they (or anyone else) has been able to demonstrate learning on their simulated nematode.

EDIT: Expanded this into a post.

[1] I looked into nematode simulations several years ago, and talked to a few people including Stephen Larson at the Open Worm project: http://www.jefftk.com/p/whole-brain-emulation-and-nematodes