When I tested the BES Push to installed the patchmanager to just one BlackBerry, it took about 1 hour to install that and download the patch.
I only have about 30 BB's on my BES so I figured it wouldn't take too long.
I bet it took about 12+ hours or so to get the patchmanager installed on 30 blackberry's.
Now i'm just running around to every BB and manually re-downloading the TZ patch and resetting the devices.
Good thing I only have 30 to do