Unrivaled Rapidity

[Orbus1]

Unrivaled Rapidity None 
2: Increase All Skills Damage Modifier by 12%
4: Increase Attack Speed by 85%
5: Increase ATK by 138
6: Increase AC by 108 

What portion of this does the group get..if any? Or is it still just a 50% haste for the group members?

[Nusa]

To answer your questions:
None of it, the pet gets all of that.
Yes, it's exactly the same 50% group haste you get from Peerless Penchant.

To explain how to read that out of Lucy:

http://lucy.allakhazam.com/spell.html?id=18126&source=Live

That's directed solely at the pet, which you can tell by looking at:
Target Type:     Pet

Now look at the "Autocast" field, right below the duration. If present, that's a spell that's then cast by the target (your pet). Even though it has the same name, it's a different spell that does a group buff:

1:     Increase Attack Speed by 28% (L1) to 50% (L44)
Target Type:     Group v2

[Orbus1]

Thanks..I appreciate the help.

[nedoirah]

I don't know if it still overwrites bottled haste. I think it does.