Not at all. There are approx. 24 million registered .com domains, 4 million .net domains and 2.6 million .org domains. Less than 1 in 10 of those domains is in use for a live site, meaning that there are over 27 million "potential" domains for sale.
Contrast that with a few thousand or tens of thousand domains dropping each day and it's a totally different story. See, the difference is the guy bidding at NW, Pool etc. knows for a fact that the domain WILL drop - the only question is WHO will get it (which is why he/she is presumably bidding) Plus they only have to read through that day's drop list (or the list 30 days out, or 60, or whatever - it's still a very limited number of domains)
On the other hand, the aftermarket consists of 27 million potential domains, some of which may or may not be for sale, none of which (approximately) are guaranteed to be available at any particular time.
I know it's a bitter pill to swallow, but the domain aftermarket and the domain drop game are as different as chalk and cheese.