Does Google define your sitename in page titles as default now?

Selected answers from the Dumb SEO Questions Facebook & G+ community.

• 
  Jim Munro: I noticed this too, today, Chris but I think it's mostly with very short titles. Is that what you are seeing?
• 
  Chris Pollard: Across the board on any title. It's not just started happening today either. It's been a few weeks since I decided to ditch the seperator and sitename. Sometime the <title> stands proud on its own as I would like but 90% of the time a random string is attached generalising the main site content.
• 
  Carl Harvey: What the hell is Google messing around with now...sort one problem out and another comes to bite your arse
• 
  Brent Wildman: Google has been doing this for over a year now. At least it's just branding your titles and not completely reworking the title every time.
  
  Maybe look into the relevancy of your Title tags and make sure they apply to the page or post they're about.
• 
  Justin Y: +Chris Pollard I think it all depends on the search query and from what I know this has been going on for awhile now. 
• 
  Chris Pollard: No problems with relevancy. It's simply because I stripped the sitename out of my posts.
  
  Google you win. I've now reverted across all my sites in order to avoid the ugliness of predicted relevancy keyword additions.
• 
  Justin Y: +Chris Pollard are your titles long enough? Are these tagged pages that you're seeing in SERPs or categories possibly? These are things that I would look at to help find the cause. This also may be do to semantic search and Google showing results more related to the searchers query.