Tide question

[cheekobonavista]

I've heard the "rule of 1/12", roughly speaking an incoming tide moves 1/12 during the hours the tides change, 2/12 the next hours, 3/12 the next two hours...

From observation I see large tide bores 1-2 feet per wave at high tide. The "rule of 1/12" would suggest that I should see the most limited tidal shifts at high tide. Why does it seem like the tide is coming in fastest at high-tide?

[BoMan]

This has helped me.

http://eoceanic.com/sailing/tips/35/310/%27rule_of_twelfths%27%3A_a_simple_method_for_estimating_intermediate_tidal_heights/?