I rarely used to achieve real backspin, under the right conditions the ball normally stops on the spot or thereabouts.

However - I bought two new wedges recently - Titleist Spin Milled 60 and 56 degs, first time I used the 60 on the course I had to lob the ball over some trees to hit the green after a particularly ambitious attempt to hit a par 4 from the tee, anyway, I had about 40 yards to hit the green and the pin was in the middle of the green, I hit ball with my usual action and to my suprise it hit the green about 10 feet in front of the hole and then spun back another 4!

This continued on my round - I just kept backspinning it (always the wrong way though - away from the hole)

So equipment does seem to makes a difference, ball was a ProV1x by the way.

I go along with what others have said here too - you've also got to make sure that you hit that small ball before the big one (the earth)

Good Luck!