Neither drivebyacct2 nor the video claims the data is stored. Carrier IQ is collecting keystroke data, which you said they were not doing. The video clearly shows, when the user presses the "1" key:
where 49 is the keycode for the "1" key. This means the Carrier IQ code is called to collect and process this event information.
We just don't know what the code is doing with this information. Perhaps it is simply updating statistics and discarding it. So I guess your argument with drivebyacct2 is on the definition of "collecting"...
They're obviously doing bad stuff, but I see no evidence of uploading your keystrokes