AI correction to choose a match-5 "T" over a match-4

Unknown

When the AI is faced with a pattern that looks like this (assume the *s are gems of the same color):
_*_
*_*
_*_
_*_

The AI *always* chooses the match-4. That is:
_*_
_**
_*_
_*_

When grabbing the top gem and pulling it into the space between the gems (making a "T" shape) would create a critical tile and an extra turn:
___
***
_*_
_*_

Given this does not clear a row or column like the match-4 would do, but how often is that more advantageous for the AI than clearing the 4 same-color tiles, getting a crit tile and an extra turn? I would understand if it were taking other factors into account, but I have never seen the AI make a "T," and I've been playing since the start.

Unknown

Pretty much the whole universe is aware. Not a mistake.

Unknown

I'm actually happy every time I see that, because I'll go "HA! No extra moves for you!"