The following boards have slot template definitions for only the 15ms slot template (as seen in their board_info.h):
agilefox 245
cc1200dk 491
derfmega 491
ez430-rf2500 491

The 15ms slot template is not present (anymore?) in the IEEE154e MAC. So they would not work with the 154e MAC in its current implementation.
This was discovered during the modifications for board projects to use dynamic slot templates (in line with the OpenRadio and "OpenTSCH" interfaces)