In situations where little is known about opponents, players often fall back upon experience. Big raises, bluffs aside, may signal high pairs like AA, KK or QQ rather than other hole cards such as JJ, TT, 99, 88, 77, AKs, AQs or AKo. Intuitive players may fold if they interpret an early tournament 3xBB raise by UTG as meaning those listed above.
A logical player might see a fold as premature. Statistically, AQo hole cards run a 64% chance of being best hand. This means 6,400 times out of 10,000 hands played AQo will win. Being early in the tournament, blinds are low, so from MP, it seems reasonable to call and to see the flop. Still, being MP, LPs have yet to play, and if a re-raise from any LP follows, the situation changes. Why? AQo are good hole cards, but not the best. AQo is the highest card with a fairly high, but not the highest, kicker. Playing AQo calls for a pre-flop bet if deep stacked early in the tournament. It does not call for a re-raise, so, if UTG makes it 3xBB and everyone folds around to MP, then only a call is in order. Where a re-raise from any late position follows a 3xBB from an earlier one, I will almost for sure fold. If UTG then comes over the top of LP, I will most definitely fold.