The vast majority of emailers who have an opinion on the subject have this opinion, more or less:
This guy says “Most people tell their browser to not underline links”.
What polling company did he use to come up with that? Zogby?
I think you’d find in a scientific poll of 1000 likely browser users that
most people don’t even know how to turn the underlining off (although they
do now, since you’ve published it).
But what do I know. I personally like the underlined links. Makes them
easier to see.