That will flood the bitcoins. yes some will refute this but face it, if they are found in 2 minutes instead of 2 hours what is that called?
That, ... well that's called minor outlier. Because at 5X the normal rate, that means in under three days difficulty will readjust. So sure there might be a burst of a lot of new coins minted, it lasting just a few days isn't enough to impact the exchange rate.
Soon, because of the ease at which they are now found, the amount found per 'successful result' will halve AND the difficulty to find them will shoot through the roof.
And this is known in advance ... when (late November, 2012) and degree (50 BTC to 25 BTC). It possibly is already priced in.