One thing I don't see on the putter tests is slope putting. I've watched a few top level players playing on faster greens than I'm used to but I keep thinking they're not giving it enough break..then in it pops.
I thought it was because they were giving extra power to putt through the break but when they miss it doesn't go much further past the hole than I do.
I think there must be a component to the better Putters which flattens out, so to speak, the break.
Anyone noticed this, or is it just my imagination. I don't have the level to test this myself.