I just had a couple stay at my place from Airbnb. They were both under 5'5. I don't have anything beyond this anecdote, but this alone must prove that someone is out there!
Sure there are exceptions, but as a rule, he's right.
I'm slightly taller than average, but even I have noticed this phenomenon. It is ridiculous how many single women say they exclusively want a tall man, they want to "look up" to a man. Even the shorter-than-average women want a man of at least average height. On dating sites like PlentyOfFish I've seen ~5' tall women say that they are only interested in men at least 6' tall. I wouldn't be surprised to learn that height is in the top 3 discriminators that women have for men (weight, race and baldness being in contention for the other two spots).
The short guys (as well as chubby, bald guys) that I know who have been successful with the ladies have all been comedians. If you can get past their firewall of physical characteristics, making a woman laugh is the root password to her lady parts and her heart. Sucks if you are short, fat, bald and not very funny though.
I am 6'2 weigh 190 and I haven't had a significant other in 2 years. Seriously, it's confidence and understanding what your standards should be. I know that seems patronizing and an over simplification but these rules seem to hold true across couples. The greater exception that we like to notice more often is "How did that guy/girl get that guy/girl".
I don't doubt that women on a dating site say those things in majority. But there is a strong minority that don't look for those things.
There is no numeric measurement for personality in online dating. If women had to balance height and personality in online dating it would reveal a much different picture.
Read The Game. I've met Neil Strauss in real life and he's 5'6" on a good day. His fiance is beautiful, smart and taller (plus, she likes to wear heels).
The Game is a superficial childish half-assed douche version of the truth.
The truth is you have to be confident and genuine, treat women like people, meet a whole lot of them, and actually try to find someone you get along with and like.
There are no shortcuts to that; you can't simulate it. The Game might get you to fake-it-til-you-make-it, but that's about it.
If you've actually read the Game you know he talks about this in the latter third of the book.
And fake-it-til-you make it is just another word for practice.
I'm somewhat biased because I know Neil and go to his intensives. But they are extremely good and I've gotten a lot out of them. Further, I decided to meet him because of the Game.