The Haase article has been discussed extensively in salbutamol thread. While quite a few samples exceeded 1000 ng/ml, only 5/117 USG-uncorrected samples (or 4/117 corrected) exceeded 2000 ng/ml, so while the study has apparently not been done, one presumes that if subjects were given 800 ug instead of 1600, very few samples would exceed 1000 ng/ml. Also none of the 234 corrected or non-corrected samples exceeded 4000 ng/ml, suggesting that it would be very rare for a subject taking 800 ug to reach 2000 ng/ml.
Some have suggested that if the exercise were still higher in intensity, to approximate that in actual racing, the levels might be still higher, but the relationship is not necessarily that simple. In the Discussion, they point out that renal function is enhanced by low intensity exercise, yet impaired by higher intensity exercise. And as emphasized before here, any explanation of Froome's level has to account for why it only occurred one time.
Not sure what Weislo's beef with Outside is.