I was testing how both Xenforo and Vbulletin appears on Google and this is why Xenforo wins in term of SEO so far. Score 89 vs 66. Although Vb5 appears to be catching up. Tested also the fetch page and Google was able to grab data much better from Xenforo then Vbulletin. Page test: https://developers.google.com/speed/pagespeed/insights Insert a random thread from Xenforo: http://xenforo.com/community/thread...it-with-more-than-the-usual-spam-today.40965/ Got an overall PageSpeed Score of 89 (out of 100) See attachment. Insert a random thread from Vbulletin 4.x version: https://www.vbulletin.com/forum/showthread.php/410737-Speed-Still-An-Issue-What-Is-VB-s-View Got an overall PageSpeed Score of 66 (out of 100) see Attachment. Edit: However, vb5 is catching up: Insert a random thread from Vbulletin 5.x version: http://www.vbulletin.com/vb5demo/forum/demo-question-answer/299-what-would-you-like-to-see Got an overall PageSpeed Score of 87 (out of 100) see Attachment.