With hundreds of carriers and markets where Windows Phone is available, it's next to impossible to tell exact dates of when an update will be available to you. Seriously, where's the big deal? Does it really matter that much when you'll exactly receive it?
Thankfully not for this update.
But I've already had updates where knowing the exact date would have saved me from tremendous grief. Denim is a rather minor update, but something like 8.1 was total havoc. Hell, without WP 8.1 I wouldn't even be able to connect to my unversity's wifi.
So yes, time is of importance. It always is. I can wait, but when the update is dated, it has to ******* be on time and with all of the announced functionality. Anything else is just ******* unprofessional.
I'm glad that I don't care about Cortana. Otherwise I would be much more annoyed.
Also, I still don't have the update, despite it being available supposedly for six days. I'm starting to suspect that I really do have a bug. (See? I can't even know if it's a bug or if the update hasn't rolled out yet - Which is a MAJOR issue in information flow)
I wish there would be other 620 users (Apparently I'm the only one on the planet) who would mention if their updates worked.