Imagine if Bitcoin was released with Satoshi holding all 21 million coins, telling everyone to start using his software so they could collecting mining fees, and that he was going to "give away" 10 million of those coins to "get the system started."
You don't see a problem with that?
It's another working way, it just need more time to spread and get used by people.You don't see a problem with that?
The bad thing of this is that Bitcoin is only an asset and a payment system, their are strictly connected.
So satoshi can be an easy target by institution and/or his own human weaknesses.
Ripple is different because of the consensus system and XRP aren't in anyway suggested as asset.
If you use them as a temporary payment system, it will be good. If you use them as asset, you are going to take a risk.
Anyway you have to remember that OpenCoin won't be able to create more XRP.
The network will be able to change the decimals by consensus.
By now I can't see bad things about the Ripple system, if there are you need to convince me more