15º of sweep and a Vmo of M0.72 (depending on the model). M0.68 for cruise is about right, maybe a little faster or slower depending on weight and what you're trying to achieve. TAS somewhere between 380 and 420 knots.
It does not have the performance of a traditional swept wing jet but it does have some redeeming features. The airbrake lets you fly it much like a turboprop. 250 knots to the localiser if your SOPs allow it and it'll slow down to 200 going down the slope with the airbrake out (not something I make a habit of, but I've done it and it worked.) Never had to do a three engine ferry though I get to practice it in the sim every 6 months. A non-event as far as performance goes.
The models with the 507 engines have better performance.