David, I think that difference between you & I is that you are basing your comments on your personal opinion, where my comments are based more on facts, and real world experience.
Correct, I am simply stating my opinion and certainly am not trying to pass off my opinion as fact.
I have no doubt CLs and oscars both have the potential to grow to over 12" long, however I find it strange that despite both species being well established in the hobby for decades and sold in their millions world-wide, photographic evidence of enormous examples seems very scarce. I've often seen 'Large Marge' being passed off as a much bigger fish than she actually was, and looking at some of the pics of her it is almost believeable:
http://www.monsterfishkeepers.com/f...Ever-Seen!!!&p=5027264&viewfull=1#post5027264
http://www.monsterfishkeepers.com/f...lown-Loaches&p=4161747&viewfull=1#post4161747
I asked Emma if she had measured her when she died and she was 12" from her nose to the very tip of her tail, and yes she has pics but at the time couldn't even bear to look at them let alone post them online (link).
Sorry if my scepticism doesn't sit well with you, and in hindsight that old post you quoted comes across somewhat rude and that certainly wasn't my intention. I wouldn't want to go as far as saying someone is outright lying about the size of their fish, but it would be foolish to think people don't over-estimate or over-exaggerate too.
That was an interesting link to the article about the different geographic populations of CL, I think I have read it before but enjoyed reading it again. I have no doubt wild caught XL sized clowns would have great potential for obtaining massive sizes if housed and cared for properly, and I can only dream of being able to obtain such fish here. Seems how this thread is now completely off-topic, I'll post the pic of what looks like the biggest CL I've ever seen;

Based on my experience with asian aros, the red has the look of a good size fish, certainly over 12" and probably more like 14-18". How the CL compares to that I'm not sure, I'd be surprised if it wasn't pretty close to 12" though, and wouldn't be surprised if it were larger, but how much larger I couldn't guess...