For what's worth this is by NO MEANS OFFICIAL! Having said that upgrade training 767 a quick look for 1/7 shows eleven and four on the 14th.

January 14th shows four on the 400.

Don't know how they will pair upgrades or anything for that matter but this might help with placing of new hires.

Oh yeah, and eight upgrades on 1/28. Hmmm. Guess just keep watching and see what happens with speculation.

As always, good luck.