We have the reverse. #1 Intense. #2 Mellow
The intense DS is 4.5 and is still intense but wow has life completely changed and we feel that for the first time in 4.5 years, our life is sort of...normal. And yes, I mean 4.5 years because from the day he was born (aww I still love thinking about that day) he was intense.
Yesterday, he watched a space documentary, jumping and leaping through the house telling us how exciting it was and all of the facts he was learning. The intensity is about some things now and not EVERYTHING. #2 has hour long tantrums but is mellow aside from that. #1 had two hour long tantrums and was never mellow. I can't tell if #2 is gifted, he's 2.5 at the moment. I literally have no idea, friends comment on his language and I just have no way of seeing it, my frame of reference is skewed.
You will get through it and if he is gifted, you've already got a head start on what to do!