So John and I are engaged in a race..... he's a relative newbie to crochet altogether, and I'm a newbie to granny squares. We started about a week apart on a granny ghan - an afghan made of one large granny square. Neither of us are doing any color changes. I think John's doing a babyghan, meaning his end size is going to be about 36"x36", whereas mine's going to be a couch throw..... so I'm thinking about 50"x50".
Here's a pic of progress thus far, side by side. John's is blue, mine gray. We'll do another progress check this weekend!