Just got mine and installed it. I can't say that I can complain with what the situation was before, so I think I will need to see what difference this system update has made.
Ok I couldn't wait. I downloaded the update but did a few speed tests before and after. Definitely an improvement and now it's consistent with the speeds that I'm getting on my phone at work. I ran two tests before and two tests after just to be sure:
I just now installed the hardware update too, but I did not have a reliable way to reproduce the 'Limited' WiFi issue. Thought it might be sleep / resume, but did that many times yesterday and did have the problem, which plagued me to no end on Monday. Do you have a way to reproduce the problem?