Yes, a lot of stuff can make the differences in those numbers mean less, but they are still there.
Depending upon many factors, one might not be able to notice the difference, but many of us can.
And that is what convinces everyone. Throw away progressive versus interlace. Just look at those number. Sorry. Not buying it. People believe what they want to. I've read for years how CBS has such great HD based on the 1080i theory yet I watch nfl games from the sources via Sunday ticket and there is no correlation between the network and the PQ.
Watch a live game on CBS sports network. After you throw up tell me that 1080 is the big factor.