You could style it yourself to place the logo anywhere you want of course, but for those with limited skill this could sometimes be problematic.
With XF you have the benefit that there is no login or search stuff in the way in case you want to make the logo larger. I always liked it when styles would include the login and search into the menu instead of in the header area.
Anyhow... i wonder if it will be easy to move the logo to the center of the header instead of to the far left.
On vB i used floats to do it, but it was a hassle to get it to look right as it would tend to push other elements around.
On XF will it be as simple as inputing the location you want the logo to be in?