Not a programming question, more of a functionality question. Does anybody know if and how one can turn off KeyTips in Office 2007?

KeyTips are the letters that pop up above menu items when you push Alt. The problem I am having is that it seems that these take a finite time to appear, and if you push a keyboard shortcut sequence too fast, Excel locks up with a message saying "Please continue entering the shortcut or push Escape to cancel".
in my business, a lot of our users are very used to controlling Excel with the keyboard and are extremely quick... this will be a bit of a disaster when we move to Office 07.

To demonstrate, just try copying a range in Excel 07 and then push Alt-E-S to bring up the Paste Special dialog. If you do it slowly, like 0.5 secs, it is fine. if you are quick, say a tenth of a second, you get the popup message.

Hence I'm looking to turn off the KeyTips.