That's a very cynical view. It might be true, but I hardly think they were just waiting for the perfect opportunity. If it made business sense before, they would've already been halting their hiring.
https://www.macrotrends.net/stocks/charts/IBM/ibm/number-of-...
What they just announced is a relatively minor round.
Also I am not sure if the 2014 decrease is also related to the formation of GlobalFoundries but I couldn't right away find news about a -80K layoff that year.