The fact that RippleLabs keeps a fraction and can move the price is EXACTLY the same thing that Satoshi and others early miners hold a huge amount of bitcoins => not a big deal. (But knowing if the 100 billion number is fixed or not is a big deal).
99 Billion of 100 Billion is a fraction?
For the peons that have been given minute amounts and the "friends" of Ripple that have been given millions, the exchange rate is currently 40,000/BTC. That's the equivalent of saying that there is a legitimate reason for the company's premined XRP to be worth $900,000,000, which is ludicrous.
Even if Satoshi were to emerge and dump all his coins, there are book orders on exchanges wanting to buy several times more bitcoins than will ever exist. Bitcoin has value that cannot be diluted, Ripple has value only until Ripple the company decides to dilute it.