Yes! There’s actually an open issue for this, I ran into this myself, but I’m not sure what approach we should take:
One some platforms the value seems somewhat opaque. Pixels feels more valuable than lines, but you only get what you get.
We could estimate a pixel value per delta value on other platforms (like 100 or 128) or decide something else. I think Flash Player uses an OS-specific scroll value, which makes more sense before smooth touch scrolling became standard.
BTW, have you run into anything else in Lime that feels like the way it works is a bit clumsier than it could be, or like a method or two is missing? Since OpenFL is the primary “user” of Lime, I don’t always get to hear as much feedback, so any points on improving Lime are appreciated.