Check your numbers on PHL again, I assure you that its more than 6.
According to Southwest, as of July 20, WN was using six gates:
http://www.swamedia.com/media_storage/city_fact_sheets/PHL.pdf
I admit that I did not fly to PHL to count them. With WN's reductions at PHL, perhaps they relinquished some gates?
As you know WN bowed out of several markets in PHL that were in direct competition with US. The big cost advantage that WN once had is slowly going away. The costs at US as well as several other airlines have gone down, and those at WN are on the rise closing the gap. WN has started more fires than they can put out. They once fed off the weaknesses of US for growth, therefore targeting mostly their markets. Now they are entering into battle with others, and they will fight back. They have to decide how they are going to handle ATL, and some of the NYC markets where the competition isn't going to lie down for them. In short, it think that your ruh-roh fear factor about them looking for 2 more gates in CLT was a bit of overkill.
US is not immediately doomed simply because Orr told the press that WN wants "at least two more" gates at CLT. You've been on this website since the beginning - recall years ago when various posters (dunno if you were one of them) would occasionally say something to the effect of "CLT isn't vulnerable to WN because there aren't any gates available."
Invariably,
ClueByFour would respond that federal law requires airports to find space for new entrants, even WN, and that Orr, the Great Protector of USAir, would eventually be forced to find some space for WN when WN came a'callin. Well, that time is now and Orr is building some space for them (and UA and DL as well). It's not the worst thing that could happen to US, but you can bet that someone in Tempe is not happy about it.
Kelly has screwed up what was once a great growth airline. Messed with the simple Rapid Rewards program. Oversaw the website degrade into a very difficult site to navigate (just too many interweb designer bells and whistles). Paying to enter markets like LGA. Overpaying by billions of dollars to get FL so that WN could have a turn-key small hub at ATL.
But CLT presents an opportunity for WN to return to its roots. It's a very low-cost, delay-free airport. WN begins with a few flights to MDW, BWI, TPA, BNA, ATL, PHL, PHX and LAS, and before you know it, they're growing to perhaps 50-100 daily 737s full of reasonably happy customers. Although WN refuses to call them "hubs," CLT will provide WN with the same hub advantages that the US fans keep saying AA needs so desperately in the Southeast corner of the country. Low-cost airport, relatively delay-free and lots and lots of runways. A lot more runways than enjoyed by most cities twice its size.