I am just wondering if DP Blog Recent post a Good backlinks in Google? I know it is do follow but don't know how it worth
Post, and then check your SERPs daily. This is the only way you'll know. But before that give a Google few days so your ranking will get stable. Then post, and investigate the effect of your posts with signature links on your sites. And, yes, they say it worths.
The quality of backlink from a Page depends on. How relevant is the page? How many outbound links are on the page? What PR the Page itself have? So you can see that, links from DP signature etc are not quality backlinks. They are backlinks, but not quality backlinks. However, these links can help your site to be crawled faster.
It counts in Webmaster Tool, but not in link:domain quarry.. So, it must not be that important to google.
Well it does provide a good backlink together with some traffic if you use the right keywords to get the attention. But how important it is according to google's view, that's rather hard to make a conclusion.
Maybe it helps us to get some benefits that's why so many link builders and seo masters buy your recent post link also on dp .