What do you think about this: Do Guestposts play a role in the last G update? This heavily (ab)used tactic was definately overused and specifically called out by Matt Cutts Does the number of disavowed links play a role? Did Google really get better at identfying and penalizing Link Networks automatically? Is the war on web-spam really successful or are spammy linking practices still present in the SERPs ? and where?