Link aggregation is still bonding, I have also heard it called LUG.
so depending on who you are talking to, when you add 2 or more nic ports together it's still bonding.
802.3ad is a mode of bonding, it has been knows to provide the best performance with DSS, but all this depends on your network.
other bonding modes are:
active-backup
broadcast
balance-xor
balance-tlb
balance-rr
I agree with webguyz about bonding, It does not make the nics faster it increases the throughput.