Myth or fact? 3 questions about the brain

I just ran across this article in the Wall Street Journal online and I actually think one of their points is wrong:

They asked their readers which of these three questions is false:

1. We use only 10% of our brain.

2. Environments rich in stimuli improve the brains of preschool children.

3. Individuals learn better when they receive information in their preferred learning style, whether auditory, visual or kinesthetic.

My answer is #1 and #3. But the authors claim that all three are false.

My argument is that there are plenty of studies showing that preschoolers exposed to language (and music and brain training and other programs) not only improve their cognitive skills now, but later in life!

Here are some examples:

1. Robust preschool experience offers lasting effects on language and literacy

2. Self-regulation game helps preschool-age children ... improve academically

3. Bilingualism has beneficial effect on children's brains and wards off symptoms of dementia later: