He points out that the US Supreme Court delivers decisions which usually involve all nine justices - wheras in the UK panels consisting of five out of the 12 Law Lords are the norm. He points out that this can lead to a lottery, the result depending upon whether one or another Lord Lord is part of the panel hearing a specific case. The argument he advances in his piece is worth considering.
Comments about the appropriate size of the top court in a country would be welcomed on this blog.