I agree with Alkay that calling something a cheap trick is not a neutral comment, nor are analogies with lemmings or moths.
A history of decorative styles vs. non-decorative styles has been proposed, in which moths gravitated to Art Deco until the correctness and golden section of modernism came along and restrained everyone to right angles, and in which the moths are in full rebellion as they flock first to historicism and then to curves. This history must be based on some kind of internal dialogue, rather than on an observation of the city around you. Every style, "decorative" or not, incorporates curved buildings and elements, and always has (maybe the only Toronto exception being Neo Georgian). In fact, Art Deco employed curves no more than many other styles did, including modernism. Here's some examples:
1889 - The Queen Anne YMCA employs an eye catching turreted round corner window to mark the meeting of Queen and Dovercourt.
1892 - Romanesque Revival Victoria Colleges is a playful assemblage of curves, all over the place.
1907 - Classical revival - Convocation Hall and right beside, the Sandford Fleming Building with its eastern facing bulge liven the U of T campus.
1910 and 1911 - Classical revival - Riverdale Library highlights its corner site with a rounded entranceway, a gesture mimicked by the Bank of Ottawa building across the street.
1932 - Beaux Arts - Dominion Public Building gently holds to the curve of Front Street.
1957 - Modernism - Dickinson's Ontario Court of Justice subtly curves and embraces Jarvis Street
1960 - Modernism - The S. Walter District Memorial Library presents a pleasingly circular aspect in the middle of the East York Park
1962 - the Expressionist Better Living Centre's huge brick curves lead users naturally to its entrances.
1963 - Bridgepoint Health wraps itself into a semi-circle, providing various views of the Don Valley and Riverdale
1965 - City Hall embraces its politicians with enfolded hands.
1976 - The modernist Ontario Hydro building reflects shards of sun into Queen's Park.
1984 - Late modernism - Diamond's Metro Central YMCA's large circular element unifies the cubes around it
1990 - The very 1980-ish Empire Plaza Condos presents its reddish facade to University.
2002 - The oval matrixes rise from beside SkyDome.
2006 - Rising from its roof element, the Four Seasons Centre incorporates a curved rooftop element, providing a visual counterpoint to its angular darkness below.
My point? An opposition has been proposed that suggests that curved elements arise from "decorative" styles (untrue) and that modernism banished this (untrue), postmodernism brought it back (untrue) and now we are returning to a more angular, less historicist style (untrue). In fact, the truth is much messier than that, and thank goddess that it is. It's only possible to sustain such a view of the city if you filter out data that contradicts what you'd perhaps like to see.
As for me, I'd much rather live in and celebrate the Toronto that we have, with multiple answers to design challenges in every era, and see a huge messy overlapping of styles and influences, than to appeal to golden sections and made-up histories to suit my prejudices. But then, I'm just a moth.