I suggest showing them the results of
"sho ip bgp damp damp | incl 7018"
from route-views.oregon-ix.net (or even from route-server.ip.att.net). I get close to 800 prefixes as being suppressed (some for up to an hour). More details can be seen via:
"sho ip bgp damp flap reg 7018"
-Hank