One little point that i read on another "related" ex-site, is that most peeps using the net wouldnt know what a problem is as regards browsing etc.
If your mail works ok, and your web pages work, thats them satisfied, of course they wont complain. Even if its running slowly, they have no comparison or experience.
Lots of peeps here do, they spot a problem, and hopefully brings it to someones attention, and hopefully a fix.
We are not naturally a nation of complainers [but maybe we are getting better] the picture of the average British chap [or chappess]taking anything thats thrown at them, needs kicking in to touch imo.