Seen in the lead-in of an article at Karmaburn:

My interest in Kimi ni Todoke originates entirely from a 95-second preview. Before that, I did not even give it a second glance when perusing the many Autumn 2009 season previews.

How typical. I dismissed Stellvia until I saw Yoko Ishida doing one of her Eurobeat parodies karaoke with a trailer.

Previews on blogs really don't tell us much. As far as information transfer, they might as well not exist, I only read them for the wit.