In the 302nd episode of Semantic Mastery's weekly Hump Day Hangouts, one participant asked if one should wait for a verified GMB before publishing the Gsite.
The exact question was:
Hi Guys! Would you wait until you have the verified GMB before publishing the gsite? Just wondering whether not having all the links in place for the initial crawl would affect anything (in turn all the iframes on the gsite as well would be missing the gmb)