ID3 Tags V2.2 are not very common -- support for it had been disabled long ago from the code in RR. We recently re-enabled the processing of those tags due to user requests. I HIGHLY recommend updating ID3 V2.2 to V2.3 (the most common format). In any case, it is safe to say that if your ID3 V2.2 has no problems with the structure/data, it should not take long to load it.
We can most definitely take a look at the issue you're having if you can provide a sample file for us to check/test. Feel free to PM me for details.