I don't think it's too much sleep. Aiden doesn't sleep nearly that much, but sleep has been a struggle for us! As long as she's happy and meeting milestones I wouldn't worry since she is awake for a good amount of time still.
I completely agree w pp's - I'd say that it's too much at all Some days it seems like Sophie doesn't sleep at all; and then other days I feel like thats all she does... A baby's number one job is to make us moms go crazy w worry!!
I don't think that's too much. I would just enjoy the extra time you have to do other things. If you are concerned about it though, you could mention it to a pediatrician. We have another baby here that is only awake for about 4 hours a day and her peditrician said it was okay. Here is a link to Melanie's thread in case you are curious.
I still thinks that's probably in the realm of acceptable (especially since Melanie had her thread). Is she acting okay when she's awake, playing and moving and stuff? She drinks and eats and doesn't seem lethargic?