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After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
When it comes to a web page Title Tag Google's Supper Smart Spiders pay no attention to the markup or punctuation used. So it truly comes down to the personal preference of the site owner. As for me and my OCD I prefer the Pipes cause they just look cooler! 
To prove this point query the following:
allintitle:"-"
allintitle:"|"
allintitle:"/"
allintitle:""
allintitle:","
All come back with BUPKIS
I was only looking at the source code on the Conversion Optimization page and not the home page. Face Palm