2. definitely false, sativas grow faster and yield more
3. true, they will stretch and be lanky, but you can control it
4. true for pure sativa, so grow hybrids
most sativa-leaning hybrids that I've grown mature in 9-10 weeks, about 7-10 days longer than the indica-leaning hybrids.
A fave is Skunk #1, and that is a heritage strain, it has been used in many of the hybrids today. Or Haze is a good one, but the original isn't as good as crosses of it. I have a Skunk x Haze that is a really nice plant. Or any of the White Widow crosses.