Ummm i don't know what the hell these other bakas [love that word] are talkin about,but so far on bleach we only know of ichigo's dad to be the only one from 'Soul Society' who has started a family and has kids.All his kids have some type of power.its kinda a duh that ichigo is that powerful because his father was a captain.Yeah about the two other noobs well they got there powers from ichigo,[he had too much power and wanted to share some sharing is caring] they were activited after being around ichigo so much after he became a death god,and glasses guy he already had powers and was training long before ichigo.Plus u can't call the power that he has his real power
cuz he uses stuff to increase his power ex.the armor and the sword thingy/arrow.Its like using a gun over ur own hands.