1. The leaks are unconfirmed. Until Microsoft announces something, they're bullshit. End of. You can have as many sources as you like, but it doesn't mean anything until something is announced. At all.
2. Unless you're the lead system architect at Microsoft, you don't know what you're talking about. If Microsoft wants to change something, they're able to do it. Microsoft are worth approximately 15x as much as Sony. If they can
change, you can bet Microsoft can too. Nothing's locked in. Why? See point 1.
3. Don't forget, both of these consoles likely aren't shipping until Q4 at the earliest. They probably won't even start manufacturing until Q3. This is a far cry from 'overnight', as you say.
4. PlayStation 4's development has been
leaking all over the place*. Durango's hasn't to the same extent. They've done a good job at keeping everything under wraps. They won't even admit the damn thing exists.
5. The only leak you've seen that's even close to being verifiable is that of an
early dev kit. The alleged specifications you've seen have largely stemmed from that and are, at this point, incredibly outdated. Go and compare Sony's alpha kit with their final shipping hardware. They are
not the same.
What do you think's more likely?
a) the specifications haven't changed since the early dev kit leak.
b) Microsoft is firmly executing its NDA on people, drying up sources' information sources.
6. We've had this
before. It's not advisable to be cocky at the start of a new console generation, let alone before it even begins, because far down the line, when the platform matures, the boundaries begin to blur and the arguments begin to
fade. It's not just about the specifications. Look at this generation. Look at any generation.
7. Just wait and see. You might be surprised. You might not. Sometimes things change. Sometimes they don't. Sometimes sources are right. Sometimes sources are wrong. Just reserve judgment and see for yourself when the time comes.
*
Don't forget, it's likely that Microsoft has their own trusted sources too, verifying information throughout Orbis' development. And probably vice-versa too.