I had HUGE amounts of lag from wings, not mine, but others around me. This was in Police Band missions and safeguard missions. I had already set my graphics to low, and I was using -useTexEnvCombine switch on my updater (it's the only way I get reasonable frame rate on my laptop in Grandville). The Safeguard maps where laggy but extremely laggy around winged players.
Suggestion to the Dev's, include wing animation in the option to see/reduce player FX.
Thanks to ventrillo, our group discovered last night that whenever someone changed into a trenchcoat costume those in the immediate area would lockup. This occurred when on the same team or not.
Testing to see if lockup issues occur when zoning by someone with a trenchcoat on causes the same issues would be a recommendation to the Devs.