That's the question, is it 100K wafers or 100K chips?  100K chips is not even one lot of 25 wafers if it were bm1387-sized chips, so that's a debug run or metal split or something. 

100K wafers on the other hand is a stupidly large order, on the order of one billion chips in 4000 lots.  The upfront cost would be quite staggering, especially if it were expedited to TSMC's highest priority as suggested by the mention of urgency.