Considering the exploit before SKY3DS and Gateway 9.0 was on 4.x - that timeline and window can be very large....but what is the usual timeline for 3ds exploits to be created and released?
Ofcourse a single datapoint doesn't make for reliable statistics and like with all hacks its a matter of chance and perseverance.
It takes an exploitable window aswell as someone to find it and subsequently use it. There's no way to give it a clear timeline.
Even if an exploitable window exists - there is no clear timeline as to how long before its actually exploited, since it all depends on what it is and entails, who are working on it at the time and so on.
Basicly - find something else to do with your time. If you're gonna sit here refreshing hoping there's an update its just gonna make the wait feel that much longer.
I'm sure you could find something else to occupy yourself with - and if not, there's always the option of SKY3DS (though given the increase in 'problem threads' I'd think twice about that one.)