[saibot]

Putting an "X on multiple messages then hitting done is way quicker than "tap and hold, delete, OK" then repeat.

You are going about the texting in a way too long route. Hit the texts tab and there's a button to compose. Type the name and message. That's 2 steps till typing.

You just have to learn to be more efficient. A PPC is your friend. If you do not wish to end a phone call while texting, Start -> Home will also get you to the Home page quickly or the Back hard key that looks like a left arrow is also helpful. There are multiple ways to do things so if the way you are trying seems ridiculous, then try another way.

If you just prefer 6.1 with the old sense you can try the Rom I posted which is very bare or you can disable sense and use the WinMo interface.