The memory usage with blitting goes nearly hand in hand with the current screen size, try the example in full screen. It was around 22 MB at my screen.
For this example I was using TweenLite 11.09 beta, but the code works with any version within a year in the past.
The few latest code snippets I have thrown here, have been formatted with non cuddling curlies. This is due to the fact that the two big companies involved to the scripting/programming languages that I am using, namely Adobe and Zend, Actionscript and PHP, both prefer that format in their coding conventions/ standards.