The date that I have marked down is April 23rd, with possible activity beginning show up around the 19th or 20th.
well.. the prediction code at www.iwebtool.com has stopped working. Maybe something is starting to happen now!
It worked for me a few days ago, but overall it hasn't been working for a long time, as you say. Regardless, I don't see what prediction tools has to do with google update? It's not accurate anyway...