On Carrier and Turbine, as a couple of examples, the thing is quite lethal, in any mode.
Scrap that, just depends on the enemy team. Like most streak rewards. :P
Played on Carrier and Raid today with a Warthog called in. Managed to take B both times with the Warthog up, no blind eye or coldblooded either. Thing just didn't target me at all... I was alone at B both times. Was midway through capturing on Carrier as it came down for its pass, and just started and finished on Raid when it passed by.
I have only called in two Warthogs and it killed more teammates than enemies. I have 6 kills with it compared to 378 kills from 99 Stealth Choppers. I have also called in two K9 Units and two Swarms. I have gotten 12 and 20 kills from those respectively.
Perhaps the Warthog is best used in Domination, Hard Point, Headquarters and Demolition. In other game modes, it would be too easy to avoid.
When the other team doesn't back out the moment they are EMP'd and hear the Warthog come down this thing does some serious damage.
Granted when I first started using it I thought it sucked too, I couldn't figure out why it's first sweep took out 4 people then it would be lucky to get one. Look at the scoreboard and there are now only 2-3 people on the other team. Happened every time I got it last night.
When I read about the evils of drinking, I gave up reading.