Holy Crap, how many people jump on LinkedIn in within 24 hours of getting a promotion and update their profile. Can you say "Look at Me"! I'm so important! Folks wake up to this under qualified over matched ego manic and put the right person in the right position.
Did you ever stop to think that maybe it was changed for reasons other than to gloat or brag? Think you're way off base here with your assumptions on her personality.
Okay I stopped and thought about it.............and no there is no other reason to change your status that fast other then to gloat or brag.