However, it is noticeably heavier
Which one did you replace that it is heavier. I checked out weight before ordering my new one. Kindle Touch 3G and Kindle Paperwhite 3G both weigh 7.8 oz on amazon.com. Not to say that might not be wrong, or possibly do you have a case that weighs a bit more this time? Not trying to argue here, genuinely interested as mine is not scheduled for delivery until the 17th.