It sounds crazy because it's not true; the Duo weighs 8.96oz, or 254g, a far cry from the MacBook weights.

I think they meant the weight reduction is equivalent to the Duo.

The delta is 300g, which is close(ish) to 254g. But yes, the laptops are heavier than the phones.

the new macbook weights one Iphone Duo less than the old macbooks.