My friend and I figured it out. The description is either wrong or it is bugged.

Prime Conditioning gives you a 10% boost to heal effects that your character casts.

In other words I have to have Prime Conditioning equipped to heal myself and others for 10% more.

Having it equipped no longer increases incoming heals from others.

Platform: windows 7
ISP: charter
Type of Internet Connection: cable
Internet Connection Speed: 3mb
Date & Time: post patch 1.19a
Frequency: constant
Character Name: Lyndria Atra
Race: Miqot'e
World: Istory
Class/Skill Rank: CNJ 50
Area and Coordinates: Uldah
Party or Solo: Party
NPC Name: n/a
Monster Name: n/a
In-Game Time: tested at night i think

Test 1 Steps:
1. strip gear to naked
2. cast cure 3 on target - heals for 850ish
3. equip prime conditioning
4. cast cure 3 on target - heals for 950ish

Test 2 Steps:
1. strip gear to naked
2. friend casts cure 3 on me - heals for 850ish
3. I equip Prime Conditioning on myself
4. friend casts cure 3 on me - heals for 850ish