It is true there is no one-size-fits-all in jiu-jitsu. Individual preferences for guard, variations of passing, differences in strength, stamina, explosiveness, and mobility ensure that styles differ wildly from person to person. Nevertheless, there appears to be a certain commonality inherent in Polish grapplers, a shared ethos, bathed in a righteous belligerence that one must never say die.
This anecdote, I feel, goes some way to sum up this hypothesis. During a session at Warsaw’s Academia Gorila, I witnessed a blue belt refuse to tap to the kimura of a higher belt (I had my own experience with this particular blue belt; seemingly, gifted grip strength from the devil himself, he’d strangled me mercilessly last year. It was somewhat depressing to return and find him sporting the same colour belt). His shoulder made an array of stomach-churning cracking sounds before the higher belt responsibly let go of the hold.
The blue belt ruminating the following day on not being able to move his arm, gleaned there were two important lessons to be learned for everyone involved. Firstly, you need to concede before something pops. Secondly, don’t ever let go of a submission until your opponent taps!