Just because a build makes it into Internal Fast Ring doesn't mean it will reach Insiders Fast Ring. I'd say delete the thread, even if it turns out later this week 10575 will go Insider Fast Ring. Start a thread then.
Will someone please list the various rings and their pecking order? This is sounding like Lord of The Rings - One ring to rule them all...
Canary Ring -> Operating System Group Ring -> Microsoft Ring -> Windows Insider Fast Ring -> Windows Insider Slow Ring.
What do "fanboys" and "insider previews" have to do with each other?... Insider builds are only for people who enjoy getting the Win10 improvements months before the general population gets them, and who don't mind the occasional bug in beta software.