After all, I think the Asha series gives around 10% margin just like what Elop expects from WP series phones whereas Symbian and N9 gave him 20-30% margins...So with same margin it would be more difficult to get the real Lumia sales figures...
But in the olden days, S60 would show up in the "Nokia smart phones" stats, and the S40 phones wouldn't. So changing this "mid race" is just boosting the smart phone numbers to look more competitive, and makes comparison of numbers before and after this shift more or less meaningless.