SEA777GUY, you don't need to listen to internet speculation because the US keeps detailed records of load factors, seat capacities, cargo uplift etc. etc., all available publicly from the Bureau of Transportation Statistics - you want the T-100 data.
http://www.transtats.bts.gov/Tables....Air%20Carriers
The data is in csv form, so once you pull the raw data and put it into Excel, it comes up with, for Jan 2016, for all ex-USA departures, load factors of:
BOS: 63.68%
DFW: 62.79%
IAD: 80.91%
IAH: 66.70%
JFK-DXB: 69.38%
JFK-MXP: 58.98%
LAX: 71.88%
MCO: 85.94%
ORD: 72.81%
SEA: 60.16%
SFO: 75.30%