Yes it is. With correct settings, doing miracles for less than month.
Please suggest what 'correct settings' are? For tier 1 backlinks
I am doing direct linking to site with PR 4+, obl 40, filtered bad words and shitty countries, doing articles, forums, web 2.0, video sites and bookmarking, blasting verified links with GSA SEO Indexer. Second tier is set to 1+, obl 50, all type of links except guestbooks, indexer and trackbacks.