Kiss... when Glen was being assessed at the clinic, he could only come up with 3 animals in a minute, and 3 D words in a minute...and he used Dog and Dinosaur for both! For a long time my son and sister and I would do the same thing... pick a letter and time ourselves... easily coming up with 20 - 30 at a time. And of course, the silence and loss of interest listen to a frequent misdiagnosis of depression.
lcalex.. there is another subforum called ALS/FTD... you might want to take a look through it, there is a lot of good information and some good reference suggestions.