How much stronger are 3-way links compared to 2-way links for SERP rankings? Assume all other factors (PR, anchor text, placement, etc) are the same.
Nobody can really answer any question like this. The way google calculates the weights of the linkings is a secret, anybody answering your question will be just guessing Now for my guess: I would guess that 3-way linking is stronger than 2-way linking. Since google can find those and reduce the weights in his algorithm. Whereas 3-way linking is not traceable.
I would have to agree with ChaosTrivia. I have read in many places that 3 way links are more valuable than 2 way links.