The bowlers who can extract more pace off the pitch tend to be the most successful bowlers in Test matches because the slightest movement can catch the edge or defeat a solid defence. With a medium pace bowler, a batsman can get forward and negate movement, to an extent.
It all boils down to what bowlers have to do to get wickets in Tests and ODIs and the differing mindsets of a batsman. Ignoring the obvious fact that batsmen will tend to try and hit medium pacers out of the park more often than fast bowlers; let us take a look at how two different paces of bowlers get caught behinds, as a case study.
A fast bowler will push a batsman back in his crease and catch an edge off a solid defence shot. This will happen more often in Test matches but less often in ODIs, when batsmen will be more inclined to hook or cut or even to leave and wait for the bad ball, which is easy to dispatch when there is pace on the ball.
A medium pacer will get an edge with a batsman who is rooted to his crease, looking to nudge and nurdle (or stand there and whack it) or one who is getting forward (or walking down the pitch) to negate the slowish movement. In a Test match, a batsman can happily can slightly forward and block the ball, but in an ODI, one of the aforementioned will occur, which is how the medium pacers catch the edge. Incidentally, batsmen getting rooted to their crease can also cause LBWs and bowleds too.
jordox said:
Nathan Bracken can bowl up to 140kph
This has always peturbed me. I would class Nathan Bracken as a medium pacer for a number of reasons. Firstly, he relies on cutters as almost a second delivery in ODIs, which means that he spends just as much time in the 110s as the 130s. It does not matter what somebody can do, it matters what they do do (lol). Secondly, I feel that a bowler like him should go down as a medium pacer simply due to the lack of carry that he gets; I am not one to disregard the speed gun all together, but he will rarely, if ever beat even a club batsman, with pace alone. He is like Irfan Pathan, but to a lesser extent, batsman play him like a bowler who is 10kph slower simply due to the lack of bounce and pace that is extracted off the pitch. If Bracken (and Pathan) bowled an exclusively full length with the bouncer as a surprise ball, then this would be a moot point, but both tend to bowl short of a length far more often than they should.