No, there's no "go right away on exact match" option - I'm a little puzzled at why this improves the situation if a user doesn't know how to spell someone's name or not - wouldn't that just make it more likely you end up at the wrong spot? Not a good plan as far as I'm concerned.
You can check out some alternate spelling instruction prompts for the directory handler here:
http://www.ciscounitytools.com/App_AlternativeDirectoryHandlerPrompts.htm
It includes some options for just spelling the first X letters of the last name only in there - be aware changes to promtps are over written during upgrades so you'll have to reapply the one you want again in that case.