Ok... I know people who can do so good shuffle that they don´t need anything else for acceleration (unfonrtunately I´m not one of them...)
I use wrap acceleration (usually every pass or hover) and chinese whips or snaps or what the heck you call them

I found chinese whips best for me. They´r fast and give lots of speed.
1d I use speed loop (=orbit thursts) or chinese whips
2d -||- chinese whips and wrap accelerations
3d -||- mostly every third, couple times I´ve got every pass for 2 in 3d shuffle but I can´t do (at least yet) 3d every pass... Can someone 3d every pass? Like 51 low? Where 5 is just pop up and 1 is wrap?
Sprinklers are and aren´t easy. Triple isn´t easy in any conditions. I can do it almost everytime and first time I did it was almost 1,5years ago but still I say that it ain´t easy trick. The main point is to get the idea how "big" the circles are in different times. Like in triple if you do small single you can´t make it triple. So in triple you have tp do as big single in the beginning as you can, then wait a bit before doing double (dunno why but for me it works nowadays (now I´m using G1s) only so that I give a little time between 1x and 2x sprinkler), or maybe it´s in rigth place and do double. When you have double in you can do triple.
But practise makes perfect, or not maybe perfect but good.

I cant watch the videos now but if I member i´ll watch them.