People need to chill the f*** out. If you're going to use Apple as the basis for comparison, then consider that they have only a few models to worry about and that they build the hardware themselves. They can skip the entire certification process that Microsoft has to go through with OEMs. Since Apple also operates its own retail channel (Apple Stores), they can practically skip the carrier certification process too. If Apple sends out an update that bricks their devices, you bring the device into an Apple Store. The carriers don't have to worry about it. With Windows Phone 7 devices (and Android devices for that matter), you have to bring the device back to the carrier's retail outlets.
If you feel waiting for the update process is unbearable, get yourself to an Apple Store and go buy yourself an iPhone. You can choose from the wide selection of models: from the 3.5" display model to the 3.5" display model or from the model without hardware keyboard to the model without hardware keyboard.
See my point? There is no such thing as a free lunch. If you want complete freedom of choice in terms of hardware (like Android), then you have to wait for the OEM decide when (or IF) they're going to update the device.
If you're willing to give up any choice of hardware in favor of quick updates to the OS, then go with Apple's offering.
If you want something in between (a decent selection of hardware from a handful of manufacturers but a consistent UX), then you go with Windows Phone 7. But you have to understand that updates will NEVER come as fast as Apple's updates. However, you can be damn sure that you will be getting the updates, something that's no guarantee with Android devices.