Wow, all you have to do is let go of L? I learn something new about this game's physics every day, I got the jump first try as soon as I did that.
Quote from kirbymastah:
There is no such think as L-lock spring space jump. It was just made-up, and gave the illusion of giving more distance since because you're looking down, you know you're as far as possible to the edge. What baby sheegoth described was a simple L jump.
Uh, no. Holding down L increases your movement speed, so holding it for a jump does make you travel further. Letting go shortly after a jump, however, makes it a lot further.