Of Course the Senator knows all about the computers at the contractors to the NSA and what they can do,
while the guy who used to be a sysadmin there knows nothing about it.
Because we all know that Senators know everything about technology.
or don't you read Pratchett?
Both are designed for minimum finger travel (in English, anyhow). I doubt seriously that this "new" layout improves upon them in any signifigant fashion, and (from the Wikipidia Dvorak article):
In 1956, a General Services Administration study by Earle Strong, which included an experiment involving ten experienced government typists, concluded that Dvorak training would never be able to amortize its costs.
So if you wanted to switch in any major fashion, you always have to get poeple ewho already type on some other layout to switch, and it's not generally cost effective.
3M has a fix for that...
FORTUNE'S FUN FACTS TO KNOW AND TELL: A cucumber is not a vegetable but a fruit.