We flew into terminal 2E this week and it took us hardly any time at all to find the TGV station. On our way home yesterday we got off the TGV at 11am, couldn't remember whether we needed 2E or 2F, went to 2F, realised we needed 2E, walked back to TGV station, followed signs for 2E and were stood in line checking in by 11.25 - it's really easy.