Thanks Mike, I did ask because I truly don't know about frontal lobe stuff and PLS, but I know a fair about it with ALS.
There are variants of FTD, but most types don't present so much with memory issues.
I know that the older i have become since around 30 the more trouble I've had with short term memory, and in times of high stress it is increased.
billbell Chris had exactly the same problem. He would know what he wanted to say when his speech was not too bad, but complex words were hard to say so he would be sitting there trying to put his thoughts into a sentence made up of simpler words. By the time he had the sentence worked out the conversation had moved on ... so frustrating for him!