Datastore queue depth, are you out there?

ESX datastore queue depth

Virtualization engineers are curious lot, especially now that we've given them access to the pre-production VMAN environment.  With all of the stats out there, of course they would find the *one* stat that I couldn't find in the tool.

Is the ESX datastore queue depth (current queue depth) captured and reported?  I'm not looking for configured max queue length though it would be really cool to be able to compare the max queue length and current queue length.