For your system, with your pipe size and your flow rate?

About 45 seconds.

If you are interested in the non-smartass answer:

You didn't provide your pipe size or the age of your faucet so I will make the following assumptions:
(1) Faucet was purchased after 1994
(2) Pipes are 3/4" copper
(3) You've got about 40' of pipe

Modern faucets have a max flow of 2.2 gpm. That amount of water travelling through 3/4" copper pipe travels at 1.46 ft/s. If the water traveled along in a perfect slug with no mixing, it would take a 27.4 seconds to exist your faucet, but it doesn't. Some mixing, and therefore cooling, takes place at the lead edge. In addition, the water is losing heat as it heats up the copper pipe along the way.

If your pipe is 1", 2.2 gpm would travel at 0.86 ft/s and take 47 seconds plus the extra time for heating the pipe and mixing with the cooler water.

Of course, YMMV if your faucet allows less flow, pipe diameter or length is different, etc,

Brand new faucet spec for it is 2.2 GPM, pipes are 3/4" copper.

So it sounds like what I'm experiencing is normal. It's funny because as you are at sink waiting to wash your hands or rinse dishes it feels like it takes forever to get hot water but timed it at 45 seconds.