All the phones in the top 10 list that Wolfram found seem to have pretty old hardware, and it doesn't feature any of the popular phones, only obscure ones. I guess that goes to show that Wolfram's results are not very accurate and relevant for this kind of answers.
The #2 is the LG 500G which I've never heard of, and #3 is HP Touchpad refurbished.
http://www.wolframalpha.com/input/?i=what+is+the+best+smartp...