Don't focus on "is he ready for kindergarten?". That isn't where any potential issues will come up. Wait a year, you won't regret it.
Answers in the order of your questions.
Can count to 30 without issue and recognize numbers up to 100, can write the alphabet in upper case, can do simple addition (due to watching sports with the old man), hates reading (like his old man) but knows some sight words, only a few verbal pronunciation issues, very energetic/athletic kid (but not AHDH type hyper), good at following directions once settled down, very social and can make friends easily, been at a "good" daycare center since just after birth.
Daycare center says to send him since he is ready. Elementary principal says we have a tough choice, but let us know he could take college credits on the school system's dime if we held him back.