I daily drive my '05 about 75 miles/day. I have 151,500 miles on it. I have not had the timing service done.
I don't plan on doing it anytime soon. I have 1/2 sec of "startup rattle" which seems 100% normal to me. Haven't even changed the oil check valves.. that thread popped up literally 5 days after I had just re-done the IM spacers and valley pan gasket and I haven't felt like getting into it again.
One of these days it will just explode on me. Every time I make a post like this I beat any nearby wood into submission.
YMMV.
Bookmarks