Most pros will nibble at you, value bet you to death and slowly acculate. When up againt loose internet qualifies, the pros are forced into making all-in calls. The calls are likely well in their favor, but if you've got someone on a flush draw your still busting out to them 1/3 of the time if you're all-in on the flop.

Pros want those 2:1 odds, but the all-in nature of internet players tends to make it for all your chips, rather than a portion of your chips.