Hi.. We have our site up and running since October 1, 2011. And its already PR5 now, due to the high quality and traffic , but its not doing good at SERPS. So, I was just looking at the google webmaster tools and I see the sitemap still says, pending. Why is that ?
I don't think that you should blame the sitemap for not high positions in Google. Still you can generate it again and resubmit to the GWM.