It will be interesting to see how much thrust was being produced just prior to what rumours suggest was an unintentional ditching. I am sure the investigators will be looking hard at this. As Boeing says 'Severe windshear may exceed the performance of the AFDS system' and the Delta Tristar crash is a good example of the extreme effect of a microburst. If for some reason thrust was too slow in increasing (water ingestion/ human error etc.) this combined with a downdraught could have contributed to the aircraft's failure to climb. It is nearly miraculous that no one was killed.