It depends on how badly they want your gig. Lots of level 2 and TRS sellers with a solid track record have delivery times ranging from 5-21 days. Sometimes even a bit longer. They have so many gigs in queue and buyers waiting that they can’t do it faster and buyers are willing.
It is true that when you are new and/or your gig offerings are not crazy-unique or otherwise amazing, price and time are your assets. Remember that a $5 gig should be something you can do pretty fast. For a longer standing seller, usually that might mean 5-15 minutes. You might get away with that starting out or you might have to work an hour or more per gig.
Still, even at that, you can figure out how many gigs you could deliver fast until you are established. What you can do if you have to is to use the limit orders feature so that buyers cannot place orders for more than you can do in 48 hours and then set a 2 day delivery time on your gigs. Once you build some reviews and so on, you can most likely shorten how much time you spend or raise your prices and also lengthen your delivery time.
It also depends on how much YOU want it. I know of a TRS who started out with a goal of making it big as fast as possible. He set up a quiet space to work and told his wife he’d be working almost non-stop except for breaks to eat, sleep, etc. and then he worked like a madman. He offered a ton of work for every $5 order and he delivered them extremely fast. He did that for a couple of months or so if I remember right, and by then he was level 2 and had a LOT of great reviews. He took a few days break and then started tapering back. Eventually he worked fairly normal hours with longer delivery times and made a good amount of money per hour. He wanted it so he worked hard enough to achieve his goals. Everyone has different goals.