*Update: It is a glitch in MCEdit from doing mass reproduction, not a vanilla bug.*

Upon making a Redstone hopper clock, when unpowered by Redstone, the items would have a delay of, not 2 ticks, but ~2 seconds. I expected it was lag, but I was getting ~18FPS, which is the best I can do on this computer. I then hooked up some comparators, command blocks, and repeaters. I came to find out that every tick = 1 second, unlike it should. I then went into another version to not be interfered with the bug, but to find out it was also happening in 1.5.2, and even the snapshots that are not on the Mojang servers. *Note: Only happens in the world in the attachments, Teleport to X: 1594.5 Y: 18 Z:-392.5 to see*

*Also, copying and pasting the world in a new world via MCEdit does not fix it*

The clock I was using was a simple 2 tick clock, being made out of 2 hoppers like this:
(Hopper, Facing >)(< Facing, Hopper) (One item going back and forth)

Update: All Redstone in the world (Buttons, Pressure Plates, Levers, etc..) has 1 tick equaling 1 second, (EX: Pressed Stone Button = 6 Seconds)