Ooh, actually it's almost always plugged in so I couldn't tell you how long it will last asleep with the lid closed :\ Wifi reconnecting after wake is indiscernible to me because by the time I type in my password to unlock the machine, I'm online. I'm totally guessing but I imagine a big factor is simply the wifi card itself and its respective level of support in Linux. I would also say that wifi management has improved a lot in the past handful of years. I often forget I'm even using Linux because it's so easy to use and problem-free for me -- but again there's always that caveat that some machines have better-supported components than others lol