The reason you guys were never told about the LCL is so that you can be in fear of death when you're first activating the Evangelion, which will raise your synch ratio, and give the Evangelion more desire to awaken.  This is standard procedure for the pilots, since early tests found that pilots scared and stressed out of their minds had much easier startup and much higher synch ratios.<br/><br/>(as shadowfox clearly demonstrates!)