Results: Your current Google PageRank is 2. Based on our calculations, we predict your future PageRank after the next Google update will be 4, an increase of 78.06%.
(and I did it again)
Results: Your current Google PageRank is 2. Based on our calculations, we predict your future PageRank after the next Google update will be 2, an increase of 1.94%.
(and again)
Results: Your current Google PageRank is 2. Based on our calculations, we predict your future PageRank after the next Google update will be 2, an increase of 2.04%.
Looks like its having some problems making its mind.
Here is the link if you wanna try yourself.