Yeah, I noticed that too. But I only use Yahoo as my "go ahead, spam-me, I don't use this account" account. Whever a site asks for an email address, I give my yahoo email.
  Imagine thye amount of crap I get there. It's totally unusable, even if I wanted too.  So, 6 Megs or 100 Megs, really just means how much crap spammers can send me. 
My wife is happy though. Her Yahoo is her main email account.