Currently (as of 2.3 R245++), it IS the case. Max Workers for the current (top most assigned) job.
Some of the folks were proposing a change to this - to one similar to research... but some of us rationalise this would not be practical.... search the forum and see ok?
![Smiley :)](http://ufoai.ninex.info/forum/Smileys/default/smiley.gif)