I've only had a brief look around xenForo, and an immediately impressed.
I have been a loyal vBulletin user, but their business plan seems to be to charge you more and give you nothing for it now. So on the four boards I run, I'm not upgrading any to v4.
Let's face it, the internet has moved on since forum software first came out. I was hoping to see vBulletin adapt to the changing demands of users, but they haven't.
Then I browsed xenForo and within minutes saw so many of the things I felt were needed. Activity streams, like system, trophies... things that things forward a bit! Plus I love the visual effects, it feels slick (like the hovers etc.).
So initial impressions .
One issue I'm having with the big forum is searches are getting longer 30 - 45 seconds. And there are slow downs. I've run through many optimisation options but it's not solved everything... and I really don't want to get involved in modifying code to install different searches etc.
So the question: how does xenForo stack up in terms of performance compared to vBulletin?