[GWN] Book Sense question

[Alex Hall]

I was reading the Comparison Chart and found it strange that the 
basic model can read SD cards or thumb drives while the more 
advanced XT can only read SD cards.  Is the chart wrong? It seems 
like, if anything, the XT should read SD and USB while the basic 
model (someone needs to come up with a name for that one) would 
only read SD, but it appears to be the other way around?

Have a great day,
Alex