Hi Alex
I guess I was not explicit enough.
Origianlly assigned in the early 80s and which domains can be registered with by the public, the others are reserved. These are known as general Top Level Domains.
gTLD = com, .edu, .gov, .int, .mil, .net, and .org
The two country code domains are TLDs in a sense, but their true classification is ccTLD or country code TLD and I do not think they hold as much value as the .com
Those are the facts part of it.
The rest is from my almost daily observations of the SERPS.
As for rankings in the SERPs on Google.com where a year or so ago, you would find the .co.uk and .au domains being returned for search queries, now you find less and less of those sites showing up.
This is of course due to localization and globalization, but also an indication of change that has and will always occur from my view point.
Clint
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