Well, here they are:
My First test results on the Galaxy S2:
Worked 8 out of 10 times. Twice it gave an error popup saying, "An unexpected exception occured when transfering the audio data to VoxCommando null"
Also, don't know if it was my imagination, but the "Start recording" button felt a bit sluggish. Earlier, it used to get "pressed" the instant I touched it. Now there is a perceptible delay (over 0.5 sec, perhaps) before it says "recording".
It is quite fast, like you said, when it works.
Let me know if you need any more information to fix these issues.
Will test on the Tab 10.1 and report soon.