<Laughing> Normal, normal, normal, normal.
I'm actually rather grateful that my son fell into category "B" (wired but generally happy when tired) rather then category "A" (cranky when tired).
And, as someone who HAS adhd (could darn well be the posterchild), I have to agree 100% with Sophie. Adhd is massively over diagnosed, and then to further compound the problem; massively over medicated. The next "it" diagnoses, child psychiatrists are warning the public not to buy into hook line and sinker, is bipolar disorder. So if you hear EITHER adhd, or bipolar, be very very leery.
Two more things to think about:
1) The qualities we admire in adults are more often then not the same ones that we beat out of our children. Ahem. Figuratively speaking. In an adult high energy & vitality are praised, in children it's hyperactivity. Knowing their own mind v. sassy, Quick witted v talking back, Stubborn v Determined, Doesn't Listen v Focused and Intent.... etc. etc. etc.
2) Natural athletes tend to have quite a bit more "energy", especially when viewed against the backdrop of other children. IMHO, it's not ACTUALLY energy, but a fascination with how their bodies move and what they can do with them next. All children though, are in the process of discovering how their bodies work, and boy oh boy do they do some cray-zay things. Experiments in physics aka "If I leap of the couch with my eyes closed, what happens? Eyes open? One eye? With slightly more pressure with my left foot? While singing? Oops...sorry puppy. With socks on/off, etc. etc. etc. etc." All children have this. That and what appears to be a delayed pain reaction. If you've got a natural athlete on your hands though, be prepared for that phase to continue pretty much forever. Medical insurance is key...every athlete I've ever met has broken at least a few bones. Not usually in their sports...but in their "Gee I wonder if I..." pursuits.
And... if it makes you feel any better... one of the hallmarks of adhd is iNTENSE concentration. Literally hours at a time. If someone with ADHD is interested in something it's durn well near impossible to pull them away or get their attention. I've known small children with adhd who easily spend 3-7 hours hyperfocused on a single thing (ignoring all others, including fires). Adults will often spend 12-36 hours hyperfocused. Another name for the disease could well be "Absent minded professor syndrome". Yes, they can never find their glasses, but they've somehow managed advanced degrees and have become an expert in their field. That's one of the many upsides, btw. Medication squashes it, but will make sure you aren't 5 minutes late. Or, ahem, go off on tangents like this one ;)