I totally agree on the focus thing in general - it's not helpful to act with PageRank in mind when it comes to layout decisions etc.
But: For large websites (e.g. 100,000 pages and up) crawl rate, indexing and rankings of deeper parts of the site depend heavily on the internal link graph. Taking a deeper look at the internal link graph gives us a lot of useful information in these cases, does it?
Now: Think of links sitting in a template that gets used on 50,000 pages. A little change here is likely to cause quite a difference in the internal link graph.
For example I've run PageRank simulations with both models on a smaller website with only 1,500 pages / 100,000 links. For many pages, the little difference ends up with 20-30% more or less internal PageRank - for these individual pages, this could be crucial for crawling, indexation and rankings. Still not useful?
Since moz runs it's own iterative PR like algorithms: How do you guys handle this with mozRank / mozTrust? Which model leads to better correlations with rankings?