You still have to filter the signal from the noise, but the ratio will be much better for casual gamer information there.
Speculation is speculation, whether it's on IndieGamer or here.The problem with the assumption that casual gamers (who actually spend money on games) must have shitty hardware is that it's simply not true. Most people who develop casual games don't really ask their customers what kind of hardware they're running it on, so they have no way of knowing.
The truth is that most casual gamers are going to have decent PC's because they're going to be using the same PC their kids use for playing World of Warcraft on.