I had Dell XPS13 (9350), and used generic synaptics driver for a while. It has been great.
Just this morning I found out that my laptop has gone through a big update(that blue screen saying hello to you).
After the boot, I found out that some of the settings were reset. Next I found out that the PTP driver was back on and my synaptics driver was gone! But guess what?
=> there is no delay when doing the micromovement! I guess they finally fixed it!
Bye.
EDIT: Ok, I still notice some delay, but it is much better in terms of response( just like other replies say).
I get most delay from pointing downward. Only this movement seems to have the same delay as before.