I honestly feel bad for everyone DC'ing. I spend most of my day dual (as per rules Im not allowed to say penta ) clienting and I don't get any sort of lag spike or DC. The most spikes I get are when Im only on one account. Like Muffin said, this is most likely from your side or perhaps it's region based. Now that I've said I don't DC, Ill most likely start DC'ing cause thats how these things usually go
Get naked a make a cute face before saying that.