Android 6.0 Marshmallow Leaks
You can count on some Android 6.0.1 Marshmallow leaks for Samsung Galaxy devices. We've already seen a few and we wouldn't be surprised if we saw a few more.
We almost always see a few updates leak out before their public release and we'd be shocked if Samsung was able to stave off leaksters during the Android 6.0.1 Marshmallow roll out.
Don't expect every single update to leak out though. We'd expect a few but we wouldn't expect a ton of early updates.
If you're adept at installing early software, keep you eyes peeled on sites like XDA-Developers for leaked Android 6.0.1 software.