I don't at all think they would have to be liars, that's a way too strong take. But they would certainly have to be making statements that seem stronger than they are (which is quite common), or more likely, making statements about the game as they played it, rather than the game as actual players play it. Because, as noted above, that's a serious and ongoing issue. It's (one part of) why 4e fans liked 4e as much as they did; with the rules being so transparent and straightforward, there was no obfuscation, intentional or accidental. You couldn't have this "well then did they LIE to us?!" moment, because the true meaning wasn't hidden by the text.