Our website has almost 50/50 ratio of dofollow and nofollow links, and our competitors have "better" ratios (more dofollow links).
I suspect it is mainly due to Twitter - several of my blog posts went viral, and had thousands of tweets in total - and twitter links are all nofollow. But I'm not sure about that - do these link count?
Also, do you think that this could cause problems? Should I worry about writing too much viral content without building traditional links first?