I think it's easy to jump to conclusions and blame the fact that it's new spec - I have done myself. But, the content is essentially the same, bar the assessed practicals (at least it is with AQA), so it can't have got much more difficult.
I do, however, think the grade boundaries will be lower this testing year because it's a new spec, with a whole new idea of 'assessed practicals' which everyone are new to, and thus nationally people are less likely to do as well as in previous years in which teachers have taught a spec for many years on end.
Although - it could completely go the other way, relatively easy papers could be released and grade boundaries may be higher than ever.
The joys of being one of the academic guinea pig generation, I suppose.