It's a different way of talking over there, over here people usually compliment, compliment compliment and THEN say 'oh..you might want to change this this and this'
On that forum you're more likely to get 'this is wrong, this is wrong' etc.
It's not that they're angry or mean, it's just a different way of approaching the problem. It's nice in that they get their point across without needing pleasantries, but you have to remind yourself that it's just a cultural difference, and they're actually very nice
In germany they tend to use 8" wheels for dwarves, so maybe that's the reason for the lack of silent spinners, I've never seen one in a german set up either.
Wish I could speak german fluently!