I seem to recall Sailfish application icons being 90px instead of Harmattan's 80px? If so, in retrospect (well, hindsight has 20/20 vision and all that) the low screen resolution shouldn't be too surprising, or the icons would be hard to use.

In fact, the icons would be the same proportion of the screen on Sailfish as on Harmattan, qHD being almost exactly 9/8 the horizontal and vertical resolution of the N9.