simondul -
To answer your question, no. The OSL slope then drops to 0.6392 and the intercept goes down to 0.0306. So it’s not really any closer to the Theil-Sen estimation than it was–it’s just in a different direction. On the other hand, if you remove that point, the Theil-Sen then changes too–to 0.6629x + 0.033. A less dramatic change.