Totally! I didn’t believe it at first either, all the butter and cheese I could dream of, and bacon! and its encouraged to salt your food! It just seemed bonkers to me but it works!
In the first few weeks you could gain, or lose, or maintain. The scale is your enemy in the first month, your goal should be to become fat adapted which is much easier when you are full and happy on fat!
So ignore the scale for the first few weeks, and just eat fat until you are full. Once you get the carbs out of your system and are in ketosis and fat adapted you will find that you get full so much faster, and get hungry less often. That is where the weight really starts to come off. Your body is burning its stored fat which is why you have virtually no hunger!
It is a good idea to try and track all your food in a food tracker like My Fitness Pal or something similar, more to make sure you are not getting hidden carbs, and to make sure your protein numbers are not incredibly high. But it is also cool to go back and just see how your numbers do start to decline and eventually you are only eating 1200 calories a day and feeling full the entire time.