Regarding file size, try a HEAD request and look for the Content-Length header: The shell command curl -sIL http://w3.org | grep Content-Length will give you the size in 8-bit bytes (octets).

Could you post some example sites, please? It would be nice to see some diverse results where your rules apply. If they are aesthetically appealing, great. If not, also great. Both results would give hints why the internet is used how it is used.

I totally understand your demands, living at the moment in Johannesburg, RSA, where more people were introduced to the internet in mobile, compressed form than in any other way (maybe this is true for the majority of people from Africa?). Bandwith is scarce, slow or more expensive than in Europe. The eurocentric web developer standard (which has no problem in terms of speed or bandwith) affects browsing a lot, f.i. if hyperlinks are uncommented (destination, possible file size, etc.) or if even the first site loads so awkwardly slow that a tea can be brewed in between. [I am crucially aware that with the blogger/blogspot domain, I have not chosen a fast blogging tool thanks to AJAX/flash/etc. Only out of convenience I will stay there until I return to Europe, than I change]
Thanks in advance, mro.

PS This is another matter altogether: do you know a way (hyperlinks welcome) to ask via the shell (wget, aria2c) how large an internet file is (explicit filesizes in kb/mb etc)?