I don’t think you will ever be able to farm 2g worth of mats at the same rate as farming 2g in COF (or whatever the current gold farming meta might be at the time). The reason being that the market isn’t cornered by mat farmers, it’s flooded with materials getting thrown up on the TP by casual players leveling their characters, grabbing dailies, going for completion, or just generally messing about in high level maps. These are the players driving down sell prices, as they’re often just dumping their daily drops for some quick silver rather than meticulously placing large sell orders to maximize profits, as a farmer of flipper might do.
I think you’d be surprised at how efficient the market is. I agree that you’ll never make the same amount in pure mats, but there are other factors to consider. You get junk loot (which I consider all loot Green or less in quality) to the tune of about 1g/hr in my experience. You get mats equivalent to about 3g/hr and you get rares or better at an average of about 1g/hr worth. All together it totals about 5g/hr which is similar to CoF farming. It varies a decent amount depending on luck and the markets but overall it’s surprisingly close.
Also you’ll find that casual players who just sell stuff usually will just sell instantly or list for 1c above or below current price. If they attempt to list more then 15% out of sync with the market trends then those items are quickly bought and flipped by people who play the TP. This has the overall effect of prices staying pretty stable throughout the weeks unless a shock (change by the devs) is introduced. Then a new equilibrium is reached, but the amount of time it takes to reach that equilibrium varies depending on the item, speculation and rarity.
There are certainly a lot of factors to consider, which is why people have full degrees in this stuff and Anet has a full time Dev just devoted to the economy.