Why do most of the answers for YA come in the first 15 minuts after posting a question?

Because a lot of people (me included) like to scan through incoming and recent questions (we rarely look through the archives)

I just spend my time on Y! answers pressing the refresh button to get the newest questions.

Because the newer questions are posted on the first page and as the question becomes older it gets pushed on to the other pages. It probably takes about 15 minutes to push it off of the first few pages and most people probably look at only the first one or two pages to find questions for answering.

Considering how many people are logged on at any one time from different countries/Time Zones, it shouldn't be surprising that you get an answer quickly. Also, some people are major points hogs and post an answer just to get points. Even if the answer isn't what the asker was looking for.

because most people, probably everyone, just hits the "answer" tab at the top, and looks at that first page of questions, and answers the ones that interest them, and never go beyond that.

so, after the question is phased out by more and more incoming questions, they are forgotten, and dont get additional answers

I have no Idea! Maybe because people post more question and the old once are like way at the bottom of the page!

Because your question pops up first in YA all categories and then goes down to where it's harder to find so yeah...if people didn't post so many questions, you'd probably get more answers.

Most recent asked questions are on the home page. Everyone goes to the homepage.

Becuase people want to get more points and they figure they probably have a better chance at a best answer if theirs is among the first.

I am pretty sure it is because if you keep pressing answers at the top then the new questions come in. I like to answer them that way.

People normally go through the most recent questions.