Palm rejection isn't really a thing I notice though, on any computer. I've had people tell me it is objectively terrible on trackpads I've had no trouble with.
I dual boot with windows and while your statement is 100% factual with Ubuntu, it seems to be better handled on windows. This appears to be a software issue; admittedly one which I think that they should be dealing with as a matter of urgency.
At least disable the thing while typing, Dell.
There are random clicks while typing.
Clicking small targets can be difficult because sometimes the cursor will decide to move 50px further than you expect
Attempting to move the cursor diagonally result in erratic stepping where the cursor moves horizontally, then vertically, then horizontally, etc.
Sometimes the cursor randomly jumps half way across the screen.
Clicks often register as drags.
And so on. I'm not alone, everyone in office has either switched to a Macbook or disabled the trackpad entirely.
Reviews i read before buying it said the trackpad is great. And since they've said similar things for all Windows laptops i've had in the past--and the trackpads have always been bad, i wouldn't count on this one being good.
I think the trackpad is great, comparable to my Air 13 although slightly wanting in tap to click. No palm detection issues. I guess you just need to give it a try yourself.