It is because your website doesn't have a PR yet, so Google doesn't bother to crawl it deeply yet.

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Sorry but these tags don't help anything. To get crawled you need links...

Apparently the original post mentions there is enough text links from main pages + has the problem of old site showing up as indexed... so one keep the indexing frsh in future is to have these tags to suggest frequent crawls ... Yeah if your suggestion is links from external sites then sure it helps as well to get listed...

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we had those tags in our original, un SEO'd version of our website - it certainly wasnt spidered and cached once every 3 days

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