how are the keywords meta tag relevant if they are not taken into consideration by google?
so no, they don't count at ALL. unless if you care much about ask.con or other search engines.
anyways, here's google saying it themselves:
"Google doesn't use the "keywords" meta tag in our web search ranking."
and
"Q: Does Google ever use the "keywords" meta tag in its web search ranking?
A: In a word, no."
source:
http://googlewebmastercentral.blogspot.com/2009/09/google-does-not-use-keywords-meta-tag.html
can it be any more clear than that?
so unless if you care much about the 1% max traffic that might come from ask.com for who the keyword metatags might be taken into consideration, but probably have very very low effect on the ranking, then fine, go for it.
