Yes speed is one of dozens or hundreds of factors. Doesn't seem to be one of the most significant ones, and is very different to having a bar below which sites attract a Penguin-like penalty. Weight in MB appears to be irrelevant to Google ranking.
So I stand by my first comment. If they cared there would be a Penguin style update to penalise page excess like they have in the past for poor quality link farms etc.
So I stand by my first comment. If they cared there would be a Penguin style update to penalise page excess like they have in the past for poor quality link farms etc.