On the first attached screen shot the main (top) tool strip is using the alternate theme colors. The second tool strip (above the listview) is using the default theme colors. On the other themes the second toolstrip would have the color of the gradient header ("queues" in the screen shot). The second screen shot is the Black Ice theme where the header and tool strip are the same.
We have it available within our medical app and have had very positive results on this very topic. The primary complaint of other themes (specifically the Blue Skies) is that there was too much contrast on the alternate theme of the toolstrip. It was too harsh and difficult to see. Yeah, there was more visible difference between the alternate and standard settings for the toolstrip background, but that is about the only place.