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Re: Browser stats Re: accessibility at risk on commercial sites:

From: David Woolley <david@djwhome.demon.co.uk>
Date: Sun, 24 Oct 2004 21:52:49 +0100 (BST)
Message-Id: <200410242052.i9OKqnj00594@djwhome.demon.co.uk>
To: w3c-wai-ig@w3.org

> statistics are unreliable (as well as generally failing to take into
> account proxying systems that check for actual changes before burning
> precious bandwidth for the purpose of providing clean statistics)...

Another of the bad things that a typical commercial web site does is
to try to frustrate caching by adding meta elements that the crib
sheets say achieve that effect (although, on a strict reading of the
specification, they probably wouldn't, and proxy caches generally
ignore contents, so fail to see them).

Even without effective, explicit, anti-cache measures, they generally,
unecessarily (or only for ad rotation), generate dynamic pages that 
lack the cache correlators (including Last-Modified-Date) needed to
do compliant caching.  On some sites, images are cachable, but the
cookies with everything sites probably break that even for images.
I suspect David isn't generating any image hits, so he is going to
be greatly under-represented, anyway, with 10 to 20 image hits per
HTML hit for a normal user.
Received on Monday, 25 October 2004 06:19:32 UTC

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