Tells, in the sense of ticks and such, are mainly ignored by good poker players. The board situation is where the info is at. A good player won't go thinking "its sweety! he could bluff", but instead "his range based on previous hands on this position is X so I estimate a chance Y for him to bluff".
Computers do have a great advantage by ignoring the whole psycho layer and focus on data only.
Computers do have a great advantage by ignoring the whole psycho layer and focus on data only.