Switch, June is going to be a harder month, but Switch should still take that as well.

Switch - 300k
Ps4 - 250k
X1 - 170k

I think Switch takes it, but PS4 closer than it was last month.
Xbox sales are just as bad as last months too.

Switch - 260k
PS4 - 240k
XOne - 120k
3DS - 60k

Something like that.

Switch : 260k
PS4 : 200k
XB1 : 110k

Switch - 250k
PS4 - 230k
XBO - 210k
3DS - 57k

Switch should have considerable amounts of momentum carrying over from the end of April with Mario Kart 8 Deluxe, plus the releases of SF2 and Minecraft, and that should be enough to give it the edge over the PS4 this month.

I'm guessing that XBO number is a joke, right?

Besides that, my numbers are close to yours.

Switch - 250K
PS4 - 220K
XBO - 95K
3DS - 65K

I can't see how anyone could have the XBO above 110K, which is about what it did last year. The XBO has been down so far this year. What is going to cause it to all of a sudden be up YOY? If we look at Amazon rankings, which has at least been a good guide, XBO took #50 and #58 last year. This year it's...not even in the Top 100. I think we are looking at sub-100K myself.

Seeing as how PS4 and XBO have been pretty close to each other for the most part with PS4 being slightly ahead every month I don't see what's so different about May that would make XBO DRASTICALLY drop to the point where it's not even at 100k.

Except the PS4 hasn't only been slightly ahead.  In just the first 4 months, the gap in the US grew by 500K.  Last month the gap was ~100K.  And it wouldn't really be a drastic drop for the XBO to drop below 100K.  It only did ~107K last year.  It would only take it being down 7% for it to drop below 100K.