While the mortgage lending crisis seems to be easing, jumbo mortgage rates remain significantly higher than they were just two months ago. During this period, many projects have announced stellar sales and reservations of new units brought on the market during this awkward period.So what's the deal? Is the Austin market so strong that people keep on buying as rates go up? Is everyone in town paying in cash? Is there really demand for another 136 buildings? The answer is no. In reality, some of the buildings have made the reservation process so painless that with $5,000 . . .