I have a sample size of 2: First kid slept through the while night immediately after coming home from hospital. When we proudly told pediatrician this at first

I have a sample size of 2: First kid slept through the while night immediately after coming home from hospital. When we proudly told pediatrician this at first checkup they became alarmed (even though weight gain was normal) and requested we wake him up every 4h. Very hard to wake him. Next checkup pediatrician says to wake him with wet washcloth. Still hard to wake, so we quit trying to wake him and enjoyed nearly 2 years of sleeping at night until kid #2: wouldn't go to sleep and continued not going to sleep until age 8.