Acceleration on a near to unreduced take off (likely with the conditions in dtm today and the load of that aircraft) is pretty fast, so if you do the 80 call it can be quite a bit faster until the decision to abort is taken, wouldn't be surprised if you reach 130, 140 kts until first action is done.
Afaik you need special training to be able to operate out of DTM at air berlin, not every pilot is rated for that and those that are have to either operate frequently from there or renew it pretty often. The new delivered aircraft are all equipped with the short field performance kit and the aircraft involved is the second last one delivered, so probably around 500 hours old.