In general it's good and I like the idea of making it fast
Only comments I have are:
- I always use the "New Posts" view, and the delimiter between 'new' posts rows and the old 'The threads below have not been updated since your last visit ...' is not as clear or visible.
- Also, there's too much vertical white space now - each post entry row is taller than before, meaning more scrolling to see the whole page of posts.
Also, don't want any haters here, but the old banner was nicer and more professional than the new one, which looks like a poor photoshop hack. Sorry