Well, I don't think this is simply large vs. small. Yes there is a trend of printing large right now; that is to be expected with the introduction of the new wide-carriage inkjets. But I also see a lot of large expensive prints sitting unsold in galleries.
Take heart: this is not small versus large. It is all a matter of how effectively you compose for the size that you print. I have seen marvelous 6x6cm contacts, and i have seen marvelous mural prints... but the subject matter was completely different.
Yes, size grabs attention. But does it hold it?