Have you marked breadcrumbs with micro data?

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

• 
  Greg Kristan: Hey Everyone!
  
  Has anyone marked up their breadcrumbs with micro data?
  
  If so did you notice anything change (like rankings, traffic, etc) to the site?
  
  I never knew you could mark up breadcrumbs on a site
  
  Thanks!
  
  -Greg
• 
  Marcus Wong: i would love to see a case study for this. I use Yoast's Wordpress SEO for Breadcrumbs with markup. Apparently it helps with CTR, though I don't have hard data to prove it. ;
• 
  Greg Kristan: +Marcus Wong same Marcus. ;I brought this up at work and I was asked if I saw any difference . I have looked all over the web and can not find this.
  
  In SEO best practices I am sure it should help, but how much is the question
• 
  Marcus Wong: well if it costs close to nothing to implement, the ROI must be crazy good, even if actual returns is minimal.
• 
  Greg Kristan: +Marcus Wong I guess that is a good point. I was just curious if others saw a negative ;effect in rankings by ;marking up their breadcrumbs ;
• 
  Mach Page Speed: +Greg Kristan I have found using markup including breadcrumbs has help one of my sites tremendously. Page 10 to 2 in 4 weeks. Added no new content. ...just markup. Do not use schema.org for breadcrumbs though. Do not show in serps.
• 
  Greg Kristan: +Mach Page Speed thanks for the ;insight! Did you do that as a site overhaul change or did you do that as an A/B test?
  
  Also I was going to mark up the breadcrumbs with Google Webmaster Tools Structured Data, is that fine? ;
• 
  Mach Page Speed: +Greg Kristan I will send you an example in a little bit.
  
  Originally when I started overhauling the site the client was not even in the top 25 pages of the serps. I cleaned it up focused on page speed and structured markup. Week 1 page 10. Week 5 page 2. Week 6 page 1. Never added any new content...just structure and speed.
• 
  Mach Page Speed: +Greg Kristan ;here is an example of breadcrumb navigation
  
  <div id=nav itemscope itemtype=http://data-vocabulary.org/Breadcrumb>
  <meta content=//mydomain.com/sevices itemprop=url>
  <meta itemprop=title content=Services>
  
  <div itemscope itemprop=child itemtype=http://data-vocabulary.org/Breadcrumb>
  <a href=//mydomain.com/service/carpet-cleaning itemprop=url>
  <span itemprop=title><strong>Carpet Cleaning</strong></span></a>
  </div>
  
  </div>
  
  I have found schema.org's version does not work yet, which they are aware of.
  
  Hope that helps.
  
  Mach Page Speed