Iff by present you mean publish
I meant present. Your research doesn't matter until you share it. You can present by publishing, by postering, or by speaking.
Don't get me wrong, I'm no fan of all the nonsense that goes into scientific publishing, it's just that it makes it easier to access, for me. Otherwise, is it not already the norm for different teams to share results between themselves before "presenting" anything publicly, in the first place
I'm not exactly sure what you mean either by "different teams" or by "sharing results"... it is common for researchers with similar interests to email back and forth about what they're doing, and it's also quite common for researchers with similar interests to have never heard of each other. Most of the time, research starts with a literature review, so you become quite familiar with what's already been published... but you don't know what hasn't been published yet, or who's working on it, unless you get lucky and hear about it via word of mouth.
A couple of typical ways for researchers to share their work and meet each other are by presenting at poster symposiums and conferences, and by giving a talk at events; for example, although she's just getting started on the research, my mentor from this past summer is going to be showing her film and giving a short talk on her research at the community college in a couple of weeks. She hasn't published, but she's presenting.
Cool. I guess that's actually a better vector for first spreading the word at ground level, introducing people to fresh research they can be excited about and further promulgate. For "different teams", the ground of similarity implied was indeed specific fields of scientific interest. This is both the connecting and limiting factor for then sharing relevant results. I also think the symposium model you describe is quite well suited for bridging that limiting divide.