Well put toghter the Weber S-320 NG yesterday and decided to plug it in and try it before I started changing anything. The grill heated to 575F in about 15 minutes (hotter than any of my previous grills) so I'm not going to do a thing.
Thanks for the info though.
That means absolutely nothing. You would need to fire all the appliances at the same time and make sure they're all running like they should.
Starving an appliance of gas is NOT a good thing at all. If I were you I'd atleast fire up all the appliances on FULL FIRE at the same time and then clock the gas meter. You should be burning enough gas to cover all the BTU counts of the appliances combined. This is not the best method of checking for under fired appliances because the number you'd get at the meter doesn't tell you what each appliance is burning, just what they are burning in total. But it will give you a rough idea of how well the gas lines are sized.
If you have a combined load of lets say 100,000 BTU on the system and you clock the meter and find that you're only burning about 80,000 BTU you have a problem with the sizing.
I hope this helps and makes sense!