Google Engaged In Cloaking Its Own Pages?

Threadwatch has a nice catch that this page from Google on AdWords traffic estimates looks different
from the cached
version
recorded by Google’s spider. In particular, the HTML title tag of the page humans see says:

Google AdWords Support: Why do traffic estimates for my Ad Group differ from those given by the standalone tool?

Whereas the title tag of the cached version says:

traffic estimator, traffic estimates, traffic tool, estimate traffic Google AdWords Support: Why do traffic estimates for my Ad Group differ from those given by the
standalone tool?

What’s going on? The first thought is that Google wants this page to rank well for terms like "traffic estimator" or "traffic estimates" and so has put them in the title
tag — but doesn’t want that bad looking title to show up to those reading the page, so it’s cloaking it.

To see the ranking impact in real-life, try a search for traffic estimator on Google, and you’ll see the US version page
in the top results (it’s first for me).

It could also be that the title previously said this and has since changed. The cached version of the page is dated March 6 as of 5AM GMT. The difference between the cached
copy and the current one was spotted on March 7. It is possible, unlikely but possible, that the page was changed within a day and that the Google spider hasn’t yet caught up
with it.

I’m checking with Google to find out what they have to say and will update as I hear. For more, see these Threadwatch posts:
Google Caught Cloaking – Keyword Stuffing Titles
and the follow-up Are Google Cloaking and
Keyword Stuffing?

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