I'm only lvl 10 on my team, and had my first visit to stormwind yesterday, and it was actually surprisingly nice.. There was a horde raid just finishing at the gates (They don't really seem to get much closer than just inside the gates), and a lot of lvl 70 ish people in that area.. Most of them were throwing comments like "I can't wait till you hit 70" and "That looks SO awesome" when I was running around..
Just as I was doing Hogger, I got one flame from a guy who thought I was cheating, but his party instantly corrected him, and again, I got a crowd following me around, just watching what I was doing.. awesome.