Google-backed sites' link profiles

[seqal]

Curious what you SEO people think of the link profiles of these (high-ranking) Google-backed UK sites:

• http://www.opensiteexplorer.org/domains?site=www.startupdonut.co.uk
• http://www.opensiteexplorer.org/domains?site=www.lawdonut.co.uk
• http://www.opensiteexplorer.org/domains?site=www.marketingdonut.co.uk
• http://www.opensiteexplorer.org/domains?site=www.itdonut.co.uk
• http://www.opensiteexplorer.org/domains?site=www.taxdonut.co.uk

Each site has between 40k and 50k inlinks counted in OSE.  However, there are relatively few linking root domains in each case:

• 273 for marketingdonut
• 216 for startupdonut
• 90 for lawdonut
• 53 for itdonut
• 16 for taxdonut

Is there something wrong with the OSE data here?  Does this imply that the average root domain linking to the taxdonut site does so with 2857 links?

The sites have no significant social media stats.

The sites are heavily inter-linked.  Also linked from the operating business, BHP Information Solutions (tagline "Gain access to SMEs").

Is this what Google would think of as a "natural" link profile?

Interestingly, they've managed to secure links on quite a few UK local authority resources pages - generally being the only commercial website on those pages.