Question about aged domain and copied content

Do google really care about copied content? I see some web/blog that have copied content from ezine/articles directory but still have better alexa rank and serp as well as PR.I heard google give the first priority to original content rather than copied content.Is that true?

Do google really know how to detect original content? I mean that if i am the first to publish the original content then somebody copy paste my content and try to boost their web ranking using my content.Do google really know who is publish first and give the priority to me in spite of somebody that stole my content

Last question.. is it true that aged domain can give something value to google? If true, what is the value in the eye of google? is it SERP? PR? traffic?

There has been a lot of commotion on the web about the Google duplicate content penalty, largely by people who heard about it but did not take the time to learn what Google was concerned with. Google's primary concern is with having multiple addresses to the same content on a site. From the search spider's perspective the www and non-www addresses are different addresses. Google's spiders can crawl twice as many pages if they do not have to crawl the same page twice because of the Internet address system. Not having two pages for every real page of content also saves them other resources, such as disc space to store the duplicates and cpu cycles to process the information.

As far as where content appears first, Google knows when and where they first found the content. There are also probably various time stamps that are available to them. Pinging and bookmarking your content can help insure that Google finds it in a timely fashion. Google wants to provide a good variety in their search results. For this reason they will try not to list the same content from multiple locations near the top of the search results. They are likely to give priority to the site on which they first indexed the content if all other things are equal.

Aged domains can be of value to you for all the reasons you list at the end your question. Just the age of the domain is not such a factor, but aged domains may have built in traffic and a volume of backlinks that can jump start your site. You do need to do some research to determine if the aged domain will be of value to you.

I think they can detect duplicate content but the real question is how they handle that.

From my experience aged domains have huge advantage in comparison to new domains in terms of SEO, but only if that aged domain have good amount of quality backlinks.

I like to steal Content/ Articles... :D
but I will spinning the articles and also optimize the keyword density after that...

If you got a backlink from a stolen, spinned but related Content, you must optmize the keyword density! So your Backlink will bring more Quality.

today i read on google blog.They said they are gonna change their algorithm in term of quality content and rank only quality site..let see their changes in few weeks

The amount and quality of links to any piece of content matters.

If you have multiple examples of copied content the version with the most and best links will usually rank the highest.

for the first question, yes, google really care about original content and they have methods to identify copied and original content. Its not difficult, if google spiders crawl a page for the first time they have records of it, so if the spider crawl again same content somewhere, they get to know it is duplicate (I think so, exactly don't know the method).
For the second question, yes, aged domains have some more advantages than new ones. Google trusts domains what are online for many years.

thanks rain for your explanation, sometimes i get confuse about trust domain, i thought trust domain come from .gov or .edu domain

not being funny but if you can find out if your content has been copied dont you think google can go one better ?
of course they can