I must say I like this way of doing it better, at least while playing Turkey.

The rules (including the old, boardgame, rules) are somewhat ambiguous. The terms "leader" and "commander" are seemingly used interchangably. The Turkish and Russian entries use the word "leader". The Austrian one uses "commander". The problem is that BOTH words apply to the leaders with three numbers. For example, Nappy is a 5-5-6 "leader". WHEN he is in charge of corps, he is also a "commander".
I think that the original authors of the AH version messed up when they wrote this. The same wording is used in the EiANW manual.
I haven't checked whether Russian and/or Austrian forces also get this bonus (under the respective chit choices, of course). It seems to me that all three should count whether with a named leader or just the unnamed corps commander.
At LAST! The greatest campaign board game of all time is finally available for the PC. Can my old heart stand the strain?