I think a major factor is the price points too. You'll get a lot of customers if your DAW is cheaper than the competition.
It seems the poll is close to accurate as far as a random poll can be. Not sure what the user base of that forum is, real musicians VS producers or electronic stuff as that will certainly make a difference. I voted 3 times so the poll was not very well executed. All I needed was a fresh computer.
One DAW caught my attention, MuLAb, and it was only $70. And the Demo looks like you could finish a song on it to try it out.. I tried to download the demo but each time ( 5 times 2 different computers) the file was deemed corrupted.. So much for that company, not even sure how they made it on the list.
Reading the blurb about each DAW and looking at the price points it's easy to see why we have made a good choice with Sonar. Cubase is the only other DAW I use from time to time and I can see why it got good placement.