New data from four of the top five newly constructed downtown condo projects (the Austonian won't release data) suggests that sales have been remarkably slow over the last six months at W Residences, Four Seasons, and BartonPlace and that many buyers who entered into contracts have failed to close. At BartonPlace, for example, 15 fewer units are reported sold or under contract than 6 months ago. Spring, in contrast, has seen a dramatic surge in sales with more than 201 units closed -- more than the other projects combined -- and 14 additional units under contract.Here is the data: