Javi holds the controller that way.
I prefer the double claw:
http://www.youtube.com/watch?v=CcXrAAX-H4M
As it gives me easier movement control on things like drifting while lasering or moonwalking etc.
That way you hold the control stick between your thumb and index finger is brilliant. I can definitely understand how having leverage on both sides of the stick vs having only the thumb. I notice for example that I'm capable of much more finesse going right than left, due to the thumb pushing outwards during those movements as opposed crumpling inwards when executing things on the left side. I'm gonna try this out for sure.
I was wondering for quite awhile now, how many of you guys play Project:M like this?
www.youtube.com/watch?v=sia6MJ0WW7E
And if so, has it been a better experience and a more viable choice for you in tournament? Would you say you have an advantage over other players?
Just in terms of advantage, this seems alright but definitely specific to ice climbers. C-stick inputs other than down look like a hassle. He ignores Z and R which is kind of a big loss considering shoulder buttons are probably the "best" kind of button (2 inputs with one press). He also makes very little use of his thumb. which is a waste.
imo having an 'advantageous' controller config is all about having the greatest number of inputs available (ie with a finger on the button ready to press) when you need them. Two fingers are always faster than one, so you want to think about inputs that you frequently need to execute in very quick succession (quick enough that finger travel time would be a factor), and spread those combinations across multiple fingers. You do however want to prefer your thumbs whenever possible, since they have the most dexterity and fastest reactions of all of your fingers. In addition, when mapping actions you should keep in mind the unique properties of each button so as to get the maximum utility out of your controller. Shoulder buttons are capable of sending two inputs in a single full press, which has obvious applications when mapped with shield. The Z button has a 1 frame delay on any input it sends, so it is in some situations inferior to other buttons. I would also consider tap jump and setting c-stick to attack to be objective advantages since they provide additional utility not otherwise possible.
Realtalk though, just use whatever you're comfortable with.