Buying 2011 RX 350

[slackermt]

I'm in the process of buying a 2011 RX 350 with 140,000 miles on it.  When I test drove it, I expected the steering to be lighter and easier than it is.  I previously had driven my Dad's 2002 RX 300, and the steering on it was feather light. 

My question is - did Lexus tighten up the steering on the newer models of the RX, or is there an issue with this one?  It's not overly difficult to turn.