To be frank I wouldn't even call Whirlwind a mixer, a Privacy Pool is a better term.
That's a powerful quote, a really good 'branding point.' I could see "privacy pool" becoming a new term, and if Whirlwind is the one to popularize it, it'd draw many users as being the one to really establish the term. There are plenty of neat business strategy aspects that I think most mixers just skip over, and it hurts their growth. More growth for whirlwind just means more privacy for all of us, so if a mixer wants to really improve the privacy of their users through a huge set of incoming and outgoing transactions, I think they should focus on innovating in a business strategy sort of way. You just don't really see that in any other mixer today.
Branding is an extremely powerful tool that is often overlooked. We've got another more philosophical discussion about Whirlwind going on here:
https://bitcointalk.org/index.php?topic=5444933.msg62070355#msg62070355, and Whirlwind proposed this idea of Blind Certificates to really supercharge the note system. Blind Certificates, unfortunately, are a pretty confusing term to anyone who doesn't want to spend half an hour researching them (as most of us wouldn't). If they were called something like "Whirlbonds" instead, well, that's pretty exciting. It's all the same tech of blind certificates, but because it has a 'cool' branded name, it just sounds exciting and gets people interested.
The moment that opened my eyes to the power of branding was when my grandma was showing me a tennis racket she bought at a thrift store. She said "Look, it even has the Liquid X Core!" I remember thinking "Grandma! That means nothing!" Still, she was sucked in and excited about some really meaningless branding term. Not saying "Privacy Pool" or "Whirlbonds" is meaningless, but just that these "branded terms" are just one aspect that can really innovate a mixer and draw in more users, which helps all of us achieve more privacy.