easter eggs are sounds on a song that are there for seemingly no purpose. examples would be the four at the start of wwry. other eggs are there for a purpose examples god works in mysterious ways and fried chicken in one vision. they can also be found on album artwork examples here are be here now by oasis which has so many eg the registration number of the car in the pool is the same as the one in abbey road by the beatles. does anyone know any in queen songs or on artwork??
It's a bit like Woodstock's speech balloons, innit?
And anyway, I thought easter eggs were hidden things you could only find by special means like the Bo Rhap flames (and on jkrowling.com if anyone's ever been there). Those that you've listed aren't easter eggs.