5 hours ago, JoNorvelleWalker said:
The person in question pronounced it (as best I can say) "Chu".
You're in New Jersey, USA. Was this in NYC or a Chinese restaurant in NE New Jersey? If so, it's possible the chap in question was from Fujian/"Fook-chow" or Jiangsi/"Kong-si" or related areas (i.e. a Wu dialect speaker) --- I *think* the pronunciation would then be closer to "chu" (as you describe) or "tsu"?
FWIW the Cantonese for it would be zo2 in Jyutping, and Cantonese is still a widely-spoken dialect (if not necessarily the dominant one) in many areas in North America. (Certain forms of Fujianese would compete with Cantonese in NYC, I believe, and possibly NE Jersey; newer Chinese-heritage immigrants I suppose would speak standard pinyin/Mandarin more routinely)
For myself I can't remember the last time I ate General Tso's Chicken. A long time ago, anyway, even if I guess I have had it in the past.
ETA: I think I ought to check out a plate or two of it again, soon. :-)