I think it may be a percent or so higher now, depending on subject. That said, I find it interesting that even though Cambridge still has damn hard exams, they still haven't escaped some grade inflation: I remember seeing a graph showing how the percentage of Firsts, 2:1s etc. has increased steadily over the last few decades. What's unclear to me is whether that's because they're awarding them more liberally now, or if students are just under a lot more pressure to succeed on paper than they used to be.
Definitely have, and it's deliberate; instead of Cambridge acting only with reference to itself (and generally grade harsher than other universities), they now apparently aim to make a Cambridge 1st or 2:1 equivalent to the same grades at the other Russell Group universities.