netmeg - 3:54 pm on Mar 13, 2013 (gmt 0)
I have added at the sites i created the webdesign by ... with my link
Google has been cracking down on that sort of thing, here and there. I'd put rel=nofollow on all those links if I were you. If you don't, then they will likely be seen as trying to manipulate PageRank. Even if you weren't, or were unaware, that's the world we live in right now.
And don't fixate on what your competitors are doing or not doing - they may have other things going on that you're not aware of, or maybe Google just hasn't gotten around to them yet. Worry about getting your own house in order.