You don't need to mention anything other than that, no. However, I would advise that you avoid using the term "speed creep" where possible because its meaning is somewhat vague and I believe has changed over time. You probably shouldn't be "using" or "applying" speed creep, and "speed creep" should probably not be used as a verb either.
Here's the original thread btw:
http://www.smogon.com/forums/showthread.php?t=74787