Gremlin29: Never mind the fact that the pilots flying the Su 35's are factory test pilots that know the workings of the plane like no military pilot Ever will. Secondly, I know from performing in airshows myself, US pilots are briefed on EXACTLY what maneuvers and flights we are permitted to perform prior to flying, and taking up a boastful challenges isn't one of em. Taking on challenges isn't something Any responsible aviator would do, particularly at an Airshow with hundreds of thousands of spectators.
The Cobra maneuver is niffty to see, I've seen it in person but it's applicability or more importantly usability in high speed combat is debatable. 3 things a combat pilot Never wants to run out of are 1. Airspeed 2. Altitude 3. Ideas. Anyone that would stand an aircraft on it's tail and put themselves in a high AOA low airspeed flight envelope with a hot fighter on their tail is an idiot. I've seen some of the other wonderful and equally impressive maneuvers the Advanced soviet designs have flown at airshows (again by truely capable and highly experienced factory test pilots), several of which resulted in the plane crashing. High maneuverablity is great don't get me wrong, but gun kills are not the order of the day for todays fighters.
Su35 may be a MATCH for F-15 but who cares? F-15 is 30 years old and scheduled for replacement in 2 more years by the F-22 which will eat Su35's for breakfast.
Guys, the last point to make is about training. I don't care how capable an aircraft is, or how spiffy the pilots uniform is. If you can't put the dollars into training it will all be for naught. Anybody remember the Luftwaffe?