Too much live rock?

[Noob]

Just wondering if it is possible to have too much live rock in your set up.
I have roughly 40gallons of water volume in my set up and about 80# of live rock, most of it being in the sump.
Watching some videos on youtube it seems like so much live rock in the sump will create access detris(sp?).
If someone can give me some advice/guidance i'd greatly appreciate it.

[Scutterborn]

I'm also curious about this...

[Zack]

I don't think you can have too much rock (within reason), it just depends on the amount of flow you have and how effectively you can eliminate dead spots. My tank has 20 lbs of lr in the display (10 gallons of water in the DT) and the way I have it scaped is pretty open.