I am well aware of that as I had my own trouble learning Smalltalk. Yet in hindsight I like the clean design of the language.
Nevertheless, I find the argument on their website kinda odd and a bit confusing. I mean, I see a lot of Smalltalk advocates claiming the language is so simple to learn and at the same time I see a lot of programmers having trouble learning it.
Maybe it is just wrong to call it 'very easy to learn' just because the syntax is simple.