Minecraft wiki entry for Development_versions, associated text: Returned the "200% time" attacks ("charged" attacks below) and the +1 reach bonus.
Missed attacks do not count as charged and are still fast.
Players cannot get the reach bonus while crouching.
Added a hard-coded single tick to the attack rate when auto-attacking, instead of being 20% slower.
Returned sweeping to only work for charged attacks and when having the Sweeping enchantment.
Returned base reach to 2.5 blocks.