I heard that if people submit article to google news they dont recieve backlink because google news are not follow and google dont give a credit is that true?
me not sure but i think its not possible because there is no problem for google to give backlinks, there is nothing criminal in it.
Google(& yahoo) backlinks do have alot of weight. I have not seen a "no follow" tag on a google owned site yet. Even if they do have a no follow tag, the link can still add 1000's of vistors to your site.
Frankly if I made the front page of Google I would be looking at all the revenue from visitors rather than searching for a no-follow tag. Backlinks only matter so much, if 20 people take that article and post your website you've got 20 unique links now, the back link from google won't always be on the front page so it won't always be all that useful.
i also didn't see any no follow tag on google news links but i don't know much that this link is counted as a back link of any website but google news is a popular site and your site link also get popularity. So i think it matters.