@Joey - what specific chargers are you looking at? generally speaking, the Tesla Destination Chargers / Wall Connectors are noted by amps to determine the rate of charge.
Play around with the charge calculator about half way down this Tesla page to get an idea of time needed based on different amps
The kW would be the amount of energy, but doesn't speak to the rate of charge. A specific amount of kWs would get the same amount of miles no matter if it was a trickle charge or super fast.
And looks like tesla is rearranging something their website - the page with the charger calculator isn't showing now (hope it comes back, because it's pretty useful I think!)