I can't speak for the whole country but I've found that a lot of "System DBA" jobs now require a fairly indepth knowledge of T-SQL. If you have a good handle on that compared to a lot of people, you might want to mention that especially if you've had to tweak/rewrite stored procedures, views, functions, triggers, etc, to resolve major performance problems. If you haven't, then don't list it because you could end up getting a job you might not like or might not be able to do.