So, you'll note a trend: probably everyone here will advise you not to bother with the statistics. It's not that we are all ignorant of what''s out there, but we see (and read about) amazing progress everyday.
Like you, I was worried when my mom was first diagnosed, and I was briefly obsessed by the numbers. Go to the Survivors section, and see how the other half is living! This board offers so much hope.
I'm sorry you had to seek us out, but you've come to a good place. Keep us posted on your Mom.
Kelly