Its relative for each player. The bowling machine does not run up and release the ball from different points each time.
Playing a bowling machine is no indicator of match performance.
I agree that bowlers "feel" faster than bowling machines and also some bowlers "feel" faster than others despite being the same speed.
145Ks from Mitchel Johnson is a lot heavier and comes on quicker than 145ks from say Broad
Well, i just got myself a Sidearm Pro to train with. The videos i've seen have had this thing up around 140km/h and my dad is about half a foot taller then the guy using it in the the vid so i assume the deliveries are around 140km/h if not more.
Things great for training, looks like a bowlers arm and anybody who can throw and us one. Great for net sessions.
I'm currently playing U17, can't wait until the season, nobody in the comp will be bowling 140km rockets at me, life should be good.
My one is broken at the moment as the bit which holds the ball has snapped off after some idiot tried using it and smacked it on the ground in his follow through. It definetely has improved my batting against pace bowlers and shorter pitched bowling.