Thunderbolt is my 2nd or 3rd favorite woodie, depending on my mood (CI Cyclone is first, Beast and Thunderbolt battle it out for 2nd).
Thunderbolt is anything *BUT* tame. Pictures are deceiving because you're only seeing a small part of the ride -- the large drops go down the hillside (Steel Phantom's large drop weaves THROUGH Thunderbolt, in fact)
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--Greg
http://www.pobox.com/~gregleg/
The Thunderbolt's great, but I think that my favorite coaster at Kennywood is the Jack Rabbit. The double dip is fantastic and there has to be more G's on it than the 'Bolt.