The last time JohnRob did major work on the software it was very slow for a couple days. I don't know enough to even guess the process, but I would guess it will be streamlined shortly. I'm confident that John would like to have the performance up to his old high standards.
The main forum page sends about 230k of data to load! That takes anywhere from 15-30 seconds to transfer on my slow rural connection - it's at least 2 or 3 times slower than the old version. Even cached, it's still very slow.
I don't see that as a step forward; too much overhead baggage just to create a page.