Am nearly ready to pull the trigger on upgrading from my increasingly-long-in-the-tooth 2008 mbp and am likely going for a late 2013 rmbp 13-inch. Been reading numerous unsettling accounts of users' machines having weird latency issues, slow wi-fi and worst of all, an inability to connect to a network in places where other machines connect without a problem. My question is, how widespread an issue is this? Does anyone have a Haswell rmbp that's performing well with wi-fi or are these problems present across the board?