I have to say, I'm loving how snappy and responsive FT is, now that I have an ad blocker active.

I really really do want to support FT, and I'm more than happy to display ads to do that - but you have to find an ad partner who can serve ads that don't slow the site down. It sounds as though you're fixing the adnxs problem ... good ... but seriously, even once that's fixed, if the rest of your ads slow the site down as much as I suspect they will, it's going to be awfully hard turn off the adblocker.

This doesn't seem like it should be that hard; just use an ad provider who renders content quickly & efficiently, and doesn't consume gobs of memory & CPU. The ads are fine. Excessive memory & CPU usage is not required, nor acceptable.