It's certainly a valid point, but it's still speculation. Once again I say:
If Blizzard didn't say it, it's not a fact.
Open Beta could come any day, I actually find it more likely that it will come sooner than the 8th, but either is possible.
You give too much credit though, beta tester or not, running this site or not, they are still not employees of Blizzard. Even employees of Blizzard can't give us any info right now so why put stock in something a non-employee says? This is an excellent WoW site, but it still won't give any extra insight into the future of facts of the release. Merely claiming that Open Beta will begin within the next two weeks is a very likely and logical deduction. That still doesn't mean it will happen.
Let's just see what really happens rather than spreading more rumors and getting people's hope up for something that may not be true.
What I'm saying is I've heard enough speculation and at this point, if it isn't a fact that Blizzard confirms, I'd rather not hear about it.
I may be wrong, but I'm thinking a lot of people feel the same way.