I've stayed out of this thread for months, and now I make the mistake of ducking my head back in here to find that the same people are arguing over the exact same things! Guys, really, what is the point? Is anybody being swayed by anything?
I should not get involved, but just this one thing.
This has been addressed, as you probably guessed.
DC was using the term "team" at this time to describe the team-ups in this title. They didn't switch to "team-up" until later.
For example, here's an ad for the very first team-up, in #50, describing how every issue of the title is going to feature a new "team":
Maybe I shouldn't have posted this, because it seems like some of the people in this thread are probably going to now try and claim that B&B #50 is the first appearance of the Detroit League.
Here's another example, an ad for the team-up in #53, which again is called a "team" even though it's just two random dudes running into each other:
Heck, given that The Atom later became the leader of the Teen Titans, maybe this unnamed "team" from #53 is actually the first appearance of the Teen Titans!