If the Uniquify/Hashfast Official Press Release isn't a big deal and merely confirmation of known info, why is the ACTM Boy's Choir salivating in anticipation of, and howling with impatience for, eASIC to Officially announce their ACTM partnership?
Because they are all in the same building, it was already obvious that they were going to be working together and the press release was largely symbolic. ActiveMining and eASIC are not intrinsically related, so showing the deal is complete would be far more than a symbolic gesture.
Glassdoor, like any thinly-populated review site, strongly tends to gather content from the disgruntled because the satisfied have much less incentive for contributing.
Also, Uniquify has twice as many employees as eASIC, so chances of finding a disgruntled ex are doubled.
So then you would think eASIC would have a bad review if it treated its employees poorly since glassdoor would attract disgruntled employees. Instead, someone was happy enough working for the company that they went out of their way to post a positive review. I think that says something.
The whole 'my ASIC partner is better than yours' thing has more than a whiff of desperation about it.
Bottom line is 400GH >> 20GH.

That is comparing apples and oranges. The cost per GH and power efficiency are the most important factors. Having a monolithic "400GH" chip (which seems technically unfeasible due to the insane power requirements in excess of high-end GPUs) also presents issues with cooling (since they are apparently using liquid cooling) and as Vbs said there could be internal interference issues preventing it from actually reaching such a high hash rate in a single chip. Most companies are also going for smaller chips like ActiveMining, which leads me to believe that there are significant drawbacks to designing such a massive, power hungry chip.