Hmm...
Some of the article is oversimplified to the point of inaccuracy and some of it is just plain inaccurate. For example, 16kHz = Air. Few people over the age of 20 can even hear up to 16kHz and sibilance can be anywhere (or everywhere!) between 3kHz and 11kHz!
As a kind of "Dummies Guide" to EQ for audio post newbies it's OK, providing you realise that's what it is and don't take any of it as gospel. For example, the statement "Before you boost something…consider cutting something else first.", is good general advice but then the suggested setting "Use the Parametric EQ at 1250hz with -18db and Q=4." is rather pointless as not only is it a rather extreme amount of cut in my experience but where exactly in the frequency spectrum one applies the EQ all depends on the frequency content of the music in the first place and of the dialogue one is trying to push through it. This is just one of many similar examples. Bare in mind also that the article only discusses EQ and none of the other most commonly used audio post tools, which to an extent is also pointless as the amount and way one applies EQ depends also on these other tools.
"The bottom line is If it sounds good…it is good" - Horsesh*t!! This is a very common/popular audio mixing quote which has caused no end of trouble over the years because it's only true given: 1. Good hearing, 2. A good monitoring system/environment and 3. A certain amount of aural objectivity.
I also agree with Will. A very large part of audio post is about competition, expectation and tech requirements. In these types of event there are no tech requirements, all the other filmmakers/competitors are likely to have very poor sound and therefore the expectation of audio is extremely low. Even if you want to stick out from the crowd and buck this trend, there's relatively little you can do given the time. For this reason you may find it difficult to get someone to do the audio post for you, because the job is essentially "basics only, no time for any creativity, try not to end up with a mix which is too crap", which is not exactly prime material for an audio post resume or showreel!
G