When you have speed, you realize that it's not magical or elusive at all, and that really it's only the product of hours upon hours of tedious, repetive, muscle building.
The problem I have with speed is that it is so fleeting. You earn it through countless hours of work, but the ratio of how long it takes to earn compared to how fast it takes to lose is insane. I spent months and months on an intensive mission to build speed; and I did. I went away for one week, played off and on a little when i came back for a few days, and lost most of it. I still don't know whether it's worth working to get it back.
I'm a little sour on speed right now (obviously) just because I had it and don't know whether I want it enough to get it back, but don't let me sour you. It's damn fun once you have (if speed has only one virtue, it's that it's FUN!!), and I respect anyone who dedicates enough of themselves to this instrument to get it. But don't let the pursuit for speed consume you, because like I said before, once you have it you realize that it DOESN'T make you more creative.
It's hard work, and if you're up to it all the power to you. If not, that's ok because realistically, who DOES have the necessary 4+ hours a day required to effectively and quickly build speed?