More spam coming through than before?

I apologize in advance if this is the wrong forum to post this in.

I've been a subscriber to spamcop for a few years and it's served me 
VERY well.

MAYBE 1 spam email "leaked" through every 1-2 months.

However, lately (I'd say last 2 months or so) I've seen a rather large 
increase of false-negative emails slipping past spamcop.  I'm up to 
about 3-5 per day now.

Also, about the same time, Road Runner (whose email system I don't use, 
but I have the account they "gave" me), also increased from about 10-
20/day to 50-75 spam emails/day.

I've asked a few of my co-workers and they seem to notice the same thing 
(increase in spam as of lately).

I know that no system is 100% perfect, so I'm not "busting" on Spamcop, 
but a lot of what is slipping through seems obvious to me that it is 
spam.  Subject lines are a dead giveaway as are the actual wording of 
the emails.

I DO submit the spam emails (I actually gave up this week and have just 
been deleting time).

Is there some sort of new "spam attack" that's been going around?