"Votes are evaluated by dropping bottom 20% and top 20%, and then the most common floor (minimum) is chosen."

What in the heck does this actually mean?  Aren't we picking the cap for the block size?  What is the talk of floor (minimum)?  What is the meaning of "most common" in this context?

In the case of a system set at 2 MB blocks, valid votes are between 1MB and 4MB.  If the votes are:

1 1 1 3 3.25  3.5 3.75  4 4 4

We then drop the top 20% and bottom 20%, leaving:

1 3 3.25 3.5 3.75 4

What is the "most common floor (minimum)" in this vote?  If it's 1, then congratulations, you've just let 21% of the mining power dictate full control over the block size.