I have never believed that any extension over another helps in SEO. I know all the gurus promote it but I have proved over and over again, that I can use a completely non-descript domain and get it indexed immediately and get in the top positions.
Now I am not talking any black hat methods here or anything out of the ordinary. Just plain good common sense - meta tags, descriptions, good articles. The topic itself and the validation from other sources in my niche has enabled me to still compete favorably.
I personally do not think the domain name falls anywhere in there.
BUT, I know plenty of people will come and refute that. To each his own
