Here are two posts with same sort of meta tags (of course with different content). One is rendered with Twitter card and other one is not (in the same user’s timeline)
Post 1: http://www.crowdchat.net/post/1225
Rendered with card: https://twitter.com/dvellante/status/371663894407675906
Post 2: http://www.crowdchat.net/post/1226
No Card: https://twitter.com/dvellante/status/371664360805920770
