Congrats to omeometo, nyoroppyi and tarotaro for making an all-Japanese podium. Not surprisingly, there were six Japanese in the Top-10. Disappointing to see the performance by Indians, but I guess it happens.
I think choatic_iak has summarized the puzzles well in his post above, so I'll skip that.

Four players solved all puzzles correctly: semax (6th), deu (8th), moss (10th), uvo (12th)

Most solved puzzles: Skyscraper (252), Shapes (246), Shades (242), Arrows (240), Circles (236)
Most correctly solved puzzles: Shapes (94%), Skyscrapers (92%), Arrows (91%), Shades (88%), Circles (88%)

Least solved puzzles: Solutions (44), Squares (69), Sums (123), Distance (135), Mines (141)
Least correctly solved puzzles: Solutions (18%), Squares (27%), Sums (51%, Mines (54%), Distance (57%)

Fastest solved puzzles (Most Points): Shapes (116), Arrows (98), Skyscrapers (77), Weights (75), Shades (74)

Seems like Solutions and Squares were clearly ones where a lot of players missed out.
There were quite a lot of submissions in less than 10 seconds, which is really cool.

Its always a pleasure working with Deb (who authored most of the puzzles) on organizing a contest... I wonder how he manages to come up with novel ideas each time in different dimensions.
It would be interesting to know the favourite puzzles of players, but, my favourites were Distance, Arrows and Shapes.

Thanks to all the 280 participants. I hope there were at least a few puzzles for each of you to enjoy solving.

And finally... after authoring 3 STs and testing 1 ST, I hope to be a participant in ST6! (a shout-out for all you wonderful authors out there :-) )