Oh absolutely not! Not here anyway
I love both long and shorter. However, I actually DON'T prefer the super duper LONG "show dog" hair on a Yorkie (well unless he/she is in the show ring of course, lol). Hmmm, let me rephrase that. I don't mind it on the body so much - but for some reason I don't like the face hair to be super duper long. Reminds me of a lion somehow, lol.
My little girl's body hair will be longer, but the hair on her face/head I will always keep in a medium length (which some MIGHT even consider to be a little on the shorter side - she is in my avatar, and that is how the hair on her head/face will most likely always be). My little boy's body hair was longer a few months ago, but I cut it short and LOVE it on him. His face I keep shorter also (not super duper short - but short enough
).
Also though, I think....it just depends on the Yorkie itself. Mind you, all Yorkies look different, and I have seen some that I actually prefer with their coats a little longer, others I think look much better with a shorter cut. I think alot of it (well at least with me personally anyway) has to do with the Yorkies nose/snout. If a Yorkie has one of the longer noses/snouts - I think the super short hair on the face only makes it look bigger/longer. Truthfully, for me - it just all depends on each individual Yorkie
But honestly, for the owner himself it's all just a matter of personal preference, and whether or not you have time to groom and maintain a longer coat.