In my FS 2004 sim I manage my flights very well, in full control at all times, admiring all the scenery around me, happy as a Sandboy .....until...my Radio suddenly bursts into life, with scrambled instructions from ATC in my headset, aimed at ME!
It always catches me by surprise, and I am not ready for it, missing out most of the instructions in a strange accent, buried amongst all the Radio background mush, and not being able to write them down quickly on my knee-board and concentrate on flying at the same time!
Panic!
ATC will only tolerate me with my request.."Say Again"...before they get really annoyed with me!
It is a fact that I constantly have problems with keeping up with all the Radio Chatter, especially in a highly active area!
Each sudden radio burst, when I am not ready for it, seems to explode in my brain and I miss most of it...."Say Again"!
Its bad enough with the "clear" chatter in the Sim, but in my few, Cessna 150/152 real aircraft flights, with all the background aircraft nose, combined with all the Radio background mush during a sudden, explosive Radio broadcast, its even more confusing...to me!
My brain has difficulty in taking it all in, and remembering all the very important details of the instructions aimed at me.
Its all too easy to acknowledge back the instruction without REALLY noting it in detail!
The Flight Sim ATC Radio chatter can be a bit confusing at times....BUT...The Radio chatter in the real aircraft with everything else going on, noise, etc, can be overwhelming when trying to take it all in, and fully understand it!
I reckon a lot of practice with real Radio communication is probably very necessary during the lessons.
When listening to the explosive, Live ATC Radio Chatter* on the computer, I have great difficulty in understanding most of it!...

(Try to remember EVERYTHING that "ATIS" has thrown at you without writing it down!)...

Paul....

...and did I mention that the Radio Headset also makes my ears uncomfortably hot, as well!
...

* http://www.liveatc.net/