I think you misunderstood. Cockerels have swollen combs earlier than pullets. They usually have 3 rows of peas raised on their combs. Pullets have 3 rows as well, but only the middle should be raised.
Pullets can have 3 raised rows but it happens later (as they near POL). And, males can have a single row. Some males have a ridge with well-defined peas and then show the side rows later like a pullet. I've even seen a few with a single ridge that has no points and no side rows. Lots of funky looks emerge with mixing comb types and this is is why it's more subjective than simply counting rows.