SEO Myth-Busters -- Isn't there a "duplicate content" penalty by another name here?

[seo_plus]

Where is that guy with the mustache in the funny hat and the geek when you truly need them?

So SEL (SearchEngineLand) said recently that there's no such thing as "duplicate content" penalties.

http://searchengineland.com/myth-duplicate-content-penalty-259657

by the way, I'd love to get Rand or Eric or others Mozzers aka TAGFEE'ers to weigh in here on this if possible.

The reason for this question is to double check a possible 'duplicate content" type penalty (possibly by another name?) that might accrue in the following situation.

1 - Assume a domain has a 30 Domain Authority (per OSE)

2 - The site on the current domain has about 100 pages - all hand coded.  Things do very well in SEO because we designed it to do so.... The site is about 6 years in the current incarnation, with a very simple e-commerce cart (again basically hand coded).  I will not name the site for obvious reasons.

3 - Business is good.  We're upgrading to a new CMS. (hooray!) In doing so we are implementing categories and faceted search (with plans to try to keep the site to under 100 new "pages" using a combination of rel canonical and noindex.  I will also not name the CMS for obvious reasons.

In simple terms, as the site is built out and launched in the next 60 - 90 days, and assume we have 500 products and 100 categories, that yields at least 50,000 pages - and with other aspects of the faceted search, it could create easily 10X that many pages.

4 - in ScreamingFrog tests of the DEV site, it is quite evident that there are many tens of thousands of unique urls that are basically the textbook illustration of a duplicate content nightmare.  ScreamingFrog has also been known to crash while spidering, and we've discovered thousands of URLS of live sites using the same CMS.

There is no question that spiders are somehow triggering some sort of infinite page generation - and we can see that both on our DEV site as well as out in the wild (in Google's Supplemental Index).

5 - Since there is no "duplicate content penalty" and there never was - are there other risks here that are caused by infinite page generation??  Like burning up a theoretical "crawl budget" or having the bots miss pages or other negative consequences?

6 - Is it also possible that bumping a site that ranks well for 100 pages up to 10,000 pages or more might very well have a linkuice penalty as a result of all this (honest but inadvertent) duplicate content?  In otherwords, is inbound linkjuice and ranking power essentially divided by the number of pages on a site?  Sure, it may be some what mediated by internal page linkjuice, but what's are the actual big-dog issues here?

So has SEL's "duplicate content myth" truly been myth-busted in this particular situation?

???

Thanks a million!

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