No. What if a well meaning highly followed person tweeted the landing page? What if your blog post was the link widely shared, it'd depend on your writing skills. If you could guarantee 10k hits from HN, 100k from Reddit front page, and 1m from 4chan which would you value the most in terms of getting paying customers? This test is a good example of how numbers fail you.
You missed the point of the OP. Please try reading it again.
The litmus test is not how many people you can get to read your blog. It's whether you're teaching people how to do something that you can sell a solution to them later:
OP: "Are you teaching anyone who looks like someone who would buy what you intend on selling? If not, why not?"
This is a test that is a necessary, but not sufficient condition for the validity of an idea. If you pass this test, you don't yet know if this is a good idea. But if you fail this test, then you defn know it's a bad idea. The value of this test is that it's easy to setup, and relies on your actions, rather than what you tell yourself--which is more truthful. Sometimes ideas are bad, not because they're intrinsically bad, but because they're a bad fit for you, which is a good thing to test for.
It's more than teaching... it's a test of your passion for the customers.
The worst thing is to get into a market and realize you really can't get excited about your customers' issues. Better to discover that about yourself earlier.
