That statement there, taken from your post, over-extends your observation beyond that of Xfire gamers. You make a fallacious jump from "Xfire gamers are hardcore gamers" to "Xfire's average playtime is the average playtime of hardcore gamers."
The "1 hour per day" dividing line is hardly a mock-able estimate. If you would look back on the post you quoted, you will see how I explain that any number above 1 hour per day would be edging towards absurd to call it casual. Using the word casual to begin with starts with an assumption that there is a line, and socially the maximum possible line would be 2 as the max sitting based upon the acceptable norms in society. As I explained, even 2 is shaky as it shows a high dedication to an activity if it is done daily. Most of these terms we use are social constructions which are, by necessity, based off of gut feelings and hearsay, not hard numbers.
Mocking a person for explaining what they mean by a term is counter productive and only serves to detract from your statements. Please refrain from posting in such a manner in the future. Debate the point in a constructive manner.
You chose to take a very specific choice of wording to fault the spirit of my argument.
I repeatedly drew attention to the use of xfire with a very specific intention - to highlight that different games vary in terms of how long hardcore players spend ingame. Therefore any notion about casual players playing X hrs or less must be taken in context of the game they are playing.
If you want to play semantics, how about this:
Is that better for you?
I chose to link some statistical data so that there is at least some objective numbers to go with. If you wish to debate it's usage by all means go ahead. But I disagree that "most of these terms we use are social constructions which are, by necessity, based off of gut feelings and hearsay, not hard numbers".
If that is the case, how about this:
The cutoff point for casual players is 1.67134 hours per day. No more, no less. Any more and you are a hardcore gamer. Any less and you are not even a serious enough gamer to be considered one.
If we start pulling numbers out of thin air with no other basis other then our own gut feeling, then this entire thread becomes a self-gratifying exercise to see who has the most likeable numbers.