Yeah, but this seems to be a recent trend. And from the quick specs I looked at the TVs are less than 1/8" smaller than 42, 46, 50, 53 inches etc.
And if you read the features of the TVs on the web site one of the big highlights is "measures 41 9/10" from corner to corner". Smaller screens say "22 inch HDTV", look at the features and in big bold print "Measures 22 inches corner to corner!!!"