I had T4-T1 connections in the third week of June (8 am on a Tuesday for T4-T1, 10:30 am on Thurs for T1-T4). The security line and bus transfer were short and smooth on Tuesday (despite the fact that there were many overnight flights landing), but nightmarishly crowded on Thursday (at least 30 minutes in security, but the bus transfer was smooth). Does anyone know if there's a "fast track" for the security line up when you're changing terminals and flying Club? The airport employees said no.