Did you know that when a tank is deployed and a railgun hits you, it slows you down? I was playing a game the other day vs. a gunner-tank team, and this tank would deploy and snipe me once so I would move more slowly for his team mates. I thought the slowdown was only for the gunner, but apparently not. The strategy worked well.
IDK what level you have to have for the slowdown, but a tank deploy did slow me down though. I am almost positive the gunner wasn't deployed, so the only other thing I could think of was that the tank deploy will slow a player down. Tomorrow I will run some tests. I will let everyone know the results.
The product grenade slows you down apparently. The tank deploy slows you down, but not nearly as much as the gunner. The difference is slight, but it is there.
I have noticed that the slowdown only works half of the time. I think it has to do with lag, the host, or a combination of the two.