that's a logical fallacy, those games might use different ports, different protocols, and have different network characteristics, it could be triggering a faulty anti-DOS rule in a crappy router, it could be triggering a faulty NAT special-case rule, it could expose a flaw in your network driver, there's a million and one things that can go wrong on a home computer that only reveal themselves for certain programs, which aren't that program's fault
or it could be an EA issue, yes. Just saying you can't assume that.