I stand corrected. The document was updated on 11/11/15 but the page in question was not – I hate it when that happens. This document will be updated on 2/26/16 for the EXOS 16.1.3 release and again in March for the EXOS 21.1 release.
Which platform are you looking for a recommended release? Also, the recommended release is more of a guideline considering some protocols being used may change the recommended version.