http://www.reddit.com/r/Bitcoin/comments/1a51xx/now_that_its...
Source? I don't believe the hard limit in blocks has ever been changed; bitcoin's devs are currently struggling to convince people to let them do it. The soft limit will NOT cause hard forks.
The only reason that fork happened was an unknown limit that existed with one database in one version and which didn't exist with an improved database in another version. It was a bug.
Here's an evaluation of the chainfork: https://github.com/bitcoin/bips/blob/master/bip-0050.mediawi...
https://en.bitcoin.it/wiki/Blocks
There is roughly 1 block every 10 minutes and it can only include 1 megabyte of transactions (transactions are around 500 bytes)
I don't think this limit has ever been hit but it doesn't allow for a ton of transactions per hour