Yes at mach 2.8 the Brahmos is really fast, at nearly 3 times the speed of sound the estimated skin temperature of the missile is approximately 323 K or 49.85 deg C at 37,000 ft. Of course, the skin temperature is dependent on altitude, atmospheric conditions, speed and aerodynamic efficiency. But consider the missile is terminal in a lo trajectory (sea skimming) the skin temperature will be appreciably higher as the missile passes through dense air, add to this the heat absorbed from the hot engine exhaust and the surrounding environment. It does not take a genius to figure that at nearly three times the speed of sound skin IR emissions contribute significantly to the IR signature of the missile in the MWIR(Mid-wavelength infrared) band. In this phase the Brahmos is a magnet for every heat seeking missile in your enemys arsenal this includes manpad and stingers. Modern heat seeking missiles are capable of "full-aspect engagements" the seeker is sensitive enough to acquire the target from any position and not just the hot exhaust.
There are several layers of a fleet defense that the missile must penetrate; the last layer is CIWS(close-in weapons) systems like Phalanx or the newer MetalStorm both come equipped with FLIR (Forward looking infrared) sensors. A single MetalStorm device is able to fire a million rounds a minute equipped with FLIR sensors the Brahmos does not stand a chance. I havent even mentioned first line of defense like LRCR (Long-Range Chaff Rocket) systems that will seduce the Brahmos by creating a ship sized decoy 14 km from the intended target.
Assuming CAP with AWACS support a Brahmos launch will be detected and countered much sooner I expect at 300km during its hi trajectory phase a capable AWACS system can seduce the missile with false data as soon as the seeker is activated. Newer jets like the EuroFighter, J-10B or MKI have electro-optic sensors specifically IRTS systems that can track and use a combination of sensors to cue missiles for a successful intercept of a supersonic sea skimming missile.
Saturation attack is the only way the Brahmos can elude all layers of a fleet defense. But at 3M$ a pop how lucky do you feel?
Whether the brahmos is overrated or not only time will tell.
The brahmos due to the heat build up may become a magnet for heat seeking missiles but dont u think the brahmos is too fast to be intercepted.It sure can be intercepted but the enemy has to fire a number of interceptors to destroy one brahmos.
Talking abt interceptors in the first gullf war US made patriot systems had detected 88 scuds engaged 53 but managed to desttroy only 27 of them.
Those were scuds.This is brahmos which is much more sophisticated.