eon, why would you state that? Have you actually experienced issues due to that? Do you seriously think that the drip method refers to water dripping from a height into the body of water in the bucket and not a rate of flow?
Just in case you do, and are purely going off of a misguided conjecture - the name refers to the rate of water exchange, and the tubing can (and is in my bucket) be submerged into the bucket, maintaining a good amount of the CO2 levels in the bucket. Yes, it'll still offgas eventually, but saying that it all offgases due to a drip is inaccurate.
Sudden PH changes are just as dangerous as sudden temperature changes, and the drip method addresses them both, at least to some degree.
I also use this method, started recently, and it works incredibly well. Far less (read: none) shock to the fish.