I recently went through this with a client of mine. Previously, they had their top 2 keywords first, then the company name.
They were ranked #2 in Google for both of their terms.
We made the switch last Monday, placing the company name first, then the keywords.
The other sites in the top 5 with them all have their keywords listed first.
Impact?
Since we made the title switch, they are still in the second position, but they are now averaging 15 more clicks per day!
I know some will say it's because the company name stands out from the clutter - and I agree on some levels. But as Doug mentioned, the title is phrased in a way that we humans like to read, so I think that helps too.