Well, for anyone interested, the plumber said regardless of any code, the lowest he would install it, would be with the spout no lower than 3" up from the counter top.
We emailed Hansgrohe, they denied that thier installation instructions included any measurements for height! Which of course is insane because they clearly do include a diamgram with measurements. They did say it should be determined between the homeowner and plumber.
Don't know about splashing yet, the sink won't be in for a while - have to wait for the granite.