No, it isn't. You said that in 3rd Edition combat, you know with a high-degree of confidence your own [combat] capabilities, with reference only to your own character sheet.
I think his argument is that he knows a bit more about his enemy than that. That by looking at his character sheet, he would know his chances against an "average orc". Whereas in 4E, the "average orc" covers a broad range of enemies spread over a number of levels.
Of course, I'm not sure I buy that as a reasonable comparison. For one thing, it is a complaint about the monster design system in 4E, not the information presented on the character sheet. For another, I don't even think it holds true - if a DM presents me with an orc in 3rd edition, I don't know if there is any guarantee as to whether it is an average orc or a levelled orc barbarian. And not knowing that, I don't know what my chances are against it.
Same holds true with skills. I can imagine that my character, decently-trained in Bluff, will be able to fool the average commoner, but might have some issues when trying to lie to the High Priest of Pelor. This is true regardless of which edition I'm playing. If I run into some rival adventurers, on the other hand, I have no idea how good they might be at seeing through my lies - I might be able to make some conjectures, but there is no real way to know my odds from my character sheet alone.