Are tube watts equal to solid state watts?

A watt is a standard unit of measurement. Here's a definition.
http://en.wikipedia.org/wiki/Watt#Definition

I agree that a watt is a watt, but tube amps can play louder due to smoother clipping characteristics than SS amps of similar power, so they will tend to seem more powerful - at least that has been my experience. There was an interesting demo at the Stereophile show in NYC last year comparing a 30 watt tube amp and a 200 watt SS amp, the tube amp seemed just as powerful because the SS amp was noticeably clipping at a certain volume level and it was not noticeable with the smaller tube amp.

I have to add this to the discussion.A while back I run with success,my Aerial 10T,known to be power hungry speakers with a Conrad Johnson MV-55.
George

Watt!!!!!!

A watt is a watt is a watt. Only present day audiophiles would ask this question. Making a distinction without a difference is the territory of subjective audiophiles, but hey these days anything goes!