Yeah I've seen that number quoted a lot but the reality is that in their FDA submission, CB testing shows that all women will show a 1-2 weeks by the time beta is 17.7 (and almost half will see it at as low as 10.2).
Aaaaanyway, I did get a positive digi tonight. I should have taken photos of just 5dp5dt vs 6dp5dt because the difference in 24 hrs is so big but in 12 hrs not so much.
I still do worry it's pretty light/low for this far out. I think I'll go get a beta done tomorrow.