Here is a link to a letter by the Dutch Ministry of Finance further describing the procedures and rules in the take-over of financial institutions. Apart from a bit of lecturing, the Finance Minister notes that ABN AMRO complicated the take-over procedure with the sale of LaSalle. There is also a hint that in the end clear arguments and information are necessary, as it is the shareholder that has to make informed decisions (in the end).
I consider that a hidden complaint as to the brave and quick panic-sale of la Sal(l)e by Groenink.
