OTA Update - why only me?

I received the OTA update and must say I am thoroughly pleased with it. Battery life has increased exponentially, Keyboard lag (lag in general) is almost non-existant, and the overall "feel" of the OS is much better.

We have 3 phones running the Android platform in this house. My DX, my wifes D2 Global, and my son's TB. Why have I been the only one to get the OTA update? I can't imagine the TB even needs an update, that thing kills my DX in every way, but my wife's D2G is in need of it! I have gone the route of Settings > About Phone > System Updates, but the silly thing says that it is up do date. Why is this?

Of which OTA update do you speak? Bear in mind that each different phone model doesn't receive the same updates. A Droid X may get an update that a D2G won't get...

605 has been good to me so far. All of the roms for prior versions that I have tried work with it to boot