forums: embedded link or links in signature?

I recently participated to a thread on a SEO forum (http://www.webproworld.com/google-discussion-forum/68650-can-inbound-links-really-hurt-you-2.html), which spreads over 5 pages. I initially picked up the thread because it was featured on the newsletter sent by the site - a good bet that this thread would be read by a fair amount of visitors.

It is certainly not what people say in there which would justify spending more than a few minutes on there. So, is it useful to stick on there for links?

I targeted my blog, and checked the stats after a few days.

1) One page is outperforming the others: page 2 has been bringing 50% of the traffic so far. Why?
2) The only difference in page 2 is the actual links to the blog I have embedded in the post. the other pages have got a link to this blog, but only in signatures.

=> traffic wise, it is therefore more important to get an opportunity to stick a link to a site in the post itself, rather than relying on the actual link in the signature to bring traffic.

Note: we are talking about ~5/10 visits/day for 1 thread, not a wide scale experiment. But figures are relevant enough though and I think that a larger scale experiment would lead to the same results.