It looks "tighter" to me. I noticed it a few days ago, but wasn't sure. I checked a few other sans serif fonts & it still looks like verdana, but has more of the feel of calibri.
Also, remember that a font will only show up if you have it installed on your computer. Meaning, you could put text in vivaldi all day long, and I will only see it in the site's default font if I do not have vivaldi installed. (this always freaks me out at work, because there are more fonts installed on that computer & I have very few on my computer at home)
So, that may be why some people are seeing it & others are not.