It's interesting because with 'normal sleep' you still have an awareness of time passing (i.e you wake up 'knowing' it's later than when you went to sleep), but with a GA you have no perception of time passing, hence why people will often ask 'has it happened yet' (as I have any times!) because you feel like you've just blinked......
Will ask the Wife for the science bit as she's a 'gas lady'....
DrP

