Just as fast as any other light tank.
Allies get more map control --> faster tanks. T70 is the best light tank before the luchs (Stuart is shit), which only has a gap if the allied player goes for call-ins.
1st: Luchs (for a faction that will be rekt by having no map control)
2nd: T70
3rd: M5
4th: Ost has no light vehicle
Tested rushing out T70s..they rekt everything, PAK isn't a solid counter because of the recon mode/self-repair and being a defensive weapon it only provides safety for 2/5 of the map. Add some Quad into the mix and you got a nice grind squad.
Sidenote: T34s + 152mm gonna be the new-meta.