Talks vs. poster presentations: Which is better for advertising your research and building research networks?
It depends on what you want to do. If you feel like at this point in your research it would be more beneficial to converse than to present, then I'd say that a poster session is the right venue for you. It's true that talks are considered a bit more prestigious than poster sessions, but you really should go with what you think will be more valuable for you, and for the conference attendees.
It's worth noting that you could always do a poster presentation this year, get the feedback that you covet, and then return next year to do a talk, and let everyone know how your research went over the subsequent year. That kind of progression is not a bad thing.
Also, if you are in the early stages of your research, it might not be ready for a talk. When I attend a conference talk, I'm expecting there to be some significant findings. Sure, talks might be more "prestigious," but, if there are some holes in your research, you could end up discrediting yourself. People aren't expecting the same level of maturity in the research during a poster session. So, as I said before, forget the prestige aspect, and choose what is more fitting based on your goals, and on what you have to share at this point in your research.
From my experience impact of posters is way, way lower than of a talk. If you can get a single person listening to you for 20 min with a poster, it is much. Plus, usually, people are distracted (noise, people moving around). And before they can ask questions, they need time to learn what you are presenting anyway. So if you have a choice between talk and poster, the first is always a better option.
Leaving aside the prestige issue for a moment, I get a lot more out of poster sessions than talks, both as a presenter and viewer. For the viewer, they can take in the information presented at their own pace, and ask for clarification if needed. If your audience gets lost during a talk, there is little chance anyone will interrupt as the talks run to a strict schedule. Good luck trying to regain your train of thought from the question session at the end. Talks are far too linear in my opinion. The discussions you have with poster presenters lead to a much better level of understanding I find, and there is a lot less inhibition in discussing the results.
All research should always be at a point for discussion. There is no scientific theory or research that should not need further discussion, at the level you get in a poster session. I have seen posters that present quite mature and significant research.
I regret to say that I have to agree that most researchers will see talks as the 'prestige' option, with posters a poor second. But this does not mean talks are necessarily better for advertising your research or networking.