Define conservative
It is looking as if this applies to WORDS. (RP excluded obviously)
Say as little as possible, and be vague when you do speak. (look at Obama, he says a lot, but it is all words..."Change" WTF are you changing buddy? Tell us)
Conserve those words, so you can get the cool new job with the impressive title.
If you use too many words, people will KNOW you are full of it, and you won't win!