[coldtea]

>is it possible this company has a linux bias?

Why would they have any other bias? Is there any other viable alternative on the server side they should car about? Are Google realistically going to switch to it? It's not like 1990, where you coded so that your script worked with 5+ UNIX vendors.

>with sh, bash-only features may not work.

Sounds like a self-inflicted problem. Just arrange so bash handles your scripts (which they do).

>.ksh extension is often used for korn shell scripts.

A trip down memory lane...