I Universe's First Stars Interaction with Dark Matter

[bluecap]

https://www.space.com/39837-first-stars-universe-fingerprints-dark-matter.html

http://www.nature.com/articles/nature25791.epdf?referrer_access_token=L6PHf4qi1jrWUOM-MYXgXtRgN0jAjWel9jnR3ZoTv0Pxjy4puk3sS91mtRutT-5oRg5bNJRASZ37GVS5rctuSuaATALT0lf9IJVXE1qOiMZdZe-NKxO-zYqYkEJ7N7MSRUGceahaslNK0jX2UTmsKTnS8oFQO3tbTi89sgpoC0W8XhBjyd1k6eXn73DqbL77-adKIudcv2bT3ejpJOLJg6oisT-ujjvLz47VmX79WVw=&tracking_referrer=www.cbc.ca

How accurate is this table detector that allegedly detected signal of first stars 180 million years after Big Bang? What possible errors can you think of? I'm basically interested in how our baryonic matter interacts with dark matter and whether there is possibility these two are like protons and electrons that made up a higher basic matter (think up normal baryonic matter with hidden sector that acts like dark matter).

 

[rootone]

How accurate is this table detector

Accurate enough to suggest that an improved version would be a good idea.

 

[bluecap]

In the second technical paper above. It says "The only known cosmic constituent that can be colder than the early cosmic gas is dark matter. The reason for this is that dark matter is assumed to interact with itself and with baryons mainly gravitationally, and so it is expected to decouple thermally in the very early Universe and cool down thereafter (very quickly if it is non-relativistic early on, as in the case of cold dark matter). Substantial electrodynamic or nuclear interactions of dark matter would be inconsistent with the observational successes of standard cosmology, including Big Bang nucleosynthesis, CMB observations and the formation and distribution of galaxies. However, weak, non-gravitational interactions are possible."

It's like dark matter is there only to support the scaffolding of our visible baryonic universe. Is there no possibility it's the other way around.. that our universe is secondary to the dark matter evolution? Any references along this line?