From the article:
A market correction is a sometimes defined as a drop of at least 10%, but not more than 20%.
Doesn't really apply, with price correction on my server running at about a 40-60% drop depending on the item
In any case, bearish market conditions are only marginally healthy as long as they don't slow down the product generation process. I can (and do) have a large backstock of certain items for sale, and as long as they eventually sell and don't impact my generation rate, it doesn't matter that they didn't sell today.
However, as soon as you start to see ennui over farming drops / crafting items the server is hurting. Already I know people who don't 75ENM anymore, because most of the drops aren't worth anything, and those that are don't sell in these conditions.
In any case, there's nothing wrong with "too many toys": that just means that toys are more accessible to everyone, instead of only accessible to the few elite power-broker magnates on the server. The free market economy will look after the distribution of the toys to the people willing to give up the most wealth to have them.