IMO, Lonsdales and Lanceros (although a fairly new size overall, I think Cohiba was the first true lancero, but it is really just a long lonsdale) have always been popular cigar sizes, in recent years larger cigars have become the new fad, I think you see "serious" cigar smokers that participate on these and other boards moving back to these more traditional sizes, but from what I have read and heard, the majority of cigar smokers are still smoking the larger ring gage smokes, and these newer huge ring gages seem to be the fad. IMHO.
I enjoy coronas, lonsdales, and lanceros, especially the Cohiba Lancero, and the Monte Cristo Especial, and I am happy to see more offerings from Non Cuban companies in this size range. If it is a fad I hope it sticks around and some of these limited production sticks become regulars in the lines.