Not really. People look at it and say "$100 for a slightly bigger HDD and Motorstorm? That doesn't seem like a very good deal..."
It doesn't make the lower priced item look like a better value! If that were true, where were the $299 core sales, or $499 20GB PS3 sales??
The pricedrop was expected and a good move, but the introduction of the 80gb pack seems to muddy the waters. With that said, I don't think most consumers will have a problem seeing the better value of the $499 pack.
The Core doesnt sell because its a waste of time. The 20GB PS3 was delibertately supply constrained - I thought that was common knowledge. The 60GB PS3 is the bread and butter, and is now cheaper than it was previously and will constitute the majority of PS3 sales for the next couple of months.