My instructor trained at the Inosanto Academy under Yori Nakamura and Erik Paulson. He has also trained with at the Machados and at Pat Miletich's school.
His striking style is mostly Muay Thai, because he trains in Muay Thai. Actually, my perception is that many Shooto guys are trained in Muay Thai-style striking, rather than TKD style.
Many of them seem to like the "Muay Thai" shin kick to the thigh. TKD does not really teach to kick with the shin.
For to win one hundred victories in one hundred battles is not the acme of skill. To subdue the enemy without fighting is the supreme excellence. Sun Tzu