No, he didn't give that as "
the" reason. There were several factors that lead him to a non-infringement verdict, most about shapes of the bezels, shape of the edges, design elements on the back of the tablet, the fact that the front is a functional element rather than a design element etc...
It's all detailed over like 20 or so paragraphs of texts, with images explaining his reasoning. Yet people go and read the final paragraph, with the "overall impression". The TL;DR version if you will.
Do yourself a favor, read the actual ruling posted on the 9th :
http://www.bailii.org/ew/cases/EWHC/Patents/2012/1882.html
Then read how it was upheld during appeal :
http://www.bailii.org/ew/cases/EWCA/Civ/2012/1339.html
It'll make you look a bit more informed and knowledgeable about what you're commenting on.