8GB is the same size as the entry level Nexus 7 and also the entry level Kindle Fire. Knowing this, why is it so hard to believe?
I'd love for the starting specs to be 16gb as much as you do, but if it is 8gb, we shouldn't be compeltely shocked and disgusted by it. Obviously those other tablets are doing just fine at 8gb. Yes there is an issue with universal apps being bloated, but if that's a concern, then maybe Apple expects those to just get a bigger one then.
Since we are all throwing out guesses, I bet it'll be one of these two:
It will start at $249 for 8gb, with increments of $100 for more storage.
Or it'll start at $299 for 16gb, with increments of $100 for more storage.
Though I wouldn't be surprised, and slightly saddened, if it's $299 for 8gb.