It is interesting that you mention that because when I watch videos of these guys demonstrating various rudiments and how fast they can do them the practice pads they are using look and sound hard as a rock. Heck, I'm pretty fast too if I'm banging on a wooden desk top.
Currently with this electric drum kit it is simple to remove the smallish snare unit from the rack and use it is a practice pad. It has a mylar head which feels less tight than real snares I have seen.
I will look up the exercises you mention.
I've got the Sound Brenner app on phone but the control unit on these electric drums have a great built in metronome which I use most of the time.
One problem I'm having real difficulty with is that I can't get the snare settings right. In other words, each strike sounds about the same. It is hard to differentiate a ghost note, from an accent, from a regular strike. I've messed with the trigger and threshold settings but just can't get it right. I may have to post on the Alesis forums to see what others have done but it could just be the limitation of a cheap electric kit.
I probably need to take lessons just so I can get some time on an acoustic set.