I have noticed the time lag thing with the typing, but haven't had the 'debugging the script' notice.
But another irritant I've been getting is when I use my iPhone, when I'm out and about. Yesterday it was impossible to use GN at all on my iPhone because every time I tried to open a thread, the site was hijacked by one of a number of rogue sites. The only one I can remember was 'digiapps', but there were several others. Once they'd taken over I couldn't get rid of them, couldn't use the back button to get back to GN. So I would close the page completely and then reopen it, but the same thing would happen, over and over again. I tried several other websites and had no problems with them - it was only the GN site.
As soon as I got home and was using my own wi-fi, everything was OK