blog commenting is strong way to generate traffic as well ranking in search engine. you can create instant back link for website.

yes Blog Commenting is effective for site if you comment on related blog

Yes, Blog Commenting effective for SEO.

It is still effective

find out do follow blogs, post relevant and informative comment, it will lead traffic to you blog/site.

Blog commenting is more important to get more backlinks

blog commenting is useful for your website like forums and directory submissions...etc.....

Yes, Blog commenting is very effective but on High PR and Relevant blogs. It help to increase site ranking and traffic.

nofollow backlinks still valuable.

Blog comment, both dofollow and nofollow still have its value, then don't stop to go and put a comment.

yes , it is useful for your site it provides quality back link .

yes Yes it is 100% effective but try to used quality site only

Blog commenting is good to generate the traffice & back link of website.

thanks

Ya, blog commenting is very effective as it shows what your thoughts are about a particular topic on which the blog is written and even you can drop a link as well for promoting your website or a blog of yours. But do remember that your comment should relate with the niche of the blog in which you are commenting.

yes blog commenting is effective but comment only post related not promted