I would not make newbies wait 6 minutes between posts either because when you're new is when you have the most questions.
Newbies ask a ton of questions, though. They also spam "thanks" posts a lot to have a higher post cost even though Activity is a better barometer of use. A good deal of information can be gleaned from just doing tons and tons of reading. I understand a lot of what you are saying, however, it does seem like a lot of users will post things like "Well, we all know BFL will never ship" without many users understanding why. There's a long history of activity, though, and one thing that really helped me was finding a few of the older members and just going through their post history. It's also interesting to actually read the general "Bitcoin Discussion" forum in reverse, starting from the first posts in 2010. You can do that here:
https://bitcointalk.org/index.php?board=1.22840I'm not sure there's a perfect way to learn Bitcoin, but a lot of the newbies also don't seem to have a good grasp on the stuff listed in the FAQ on Bitcoin Myths:
https://en.bitcoin.it/wiki/MythsA lot of stuff is stickied for a reason, too. Doesn't seem to matter much, though.