There is nothing unfortunately uninformed about my comment. There is something unfortunately condescending about your reply.
I am well aware that Chinese radical phonetic components are not as powerful as a phonetic alphabet. I am impliying no such thing. There are however many characters which carry phonetic information, such as my apparently crude example above. I have found this to be very helpful in remembering pronunciations of characters, even if they are only approximations. HN is a tough crowd.
Further, your experiences with Chinese people are not necessarily the same as mine.
> I can usually guess the pronunciation of new characters. [...] These are all pronounced "ding" [...] because they all have that T-like phonetic component.
(emphasis mine)
This is, quite clearly, saying that you can get the pronunciation of an unfamiliar character from its written form. But you can't; that's incredibly dangerous and is nearly guaranteed to backfire within 2-3 guesses. You use the particular example of characters with the phonophore 丁 ding1. Okay. What's the most common character incorporating that component? It's 打, which you seem to have conveniently glossed over, and which, despite using 丁 as the phonophore, is pronounced da3. You also give 顶, which really is pronounced ding(3), but which is backwards like 切, making it fairly problematic to guess which component is hinting at the sound. (For a nice summary of that problem, 致 and 到 are both characters in the same style, with a sound hint and a meaning hint side by side. But for 致 zhi4, the phonophore is the 至 (also zhi4) on the left, and for 到 dao4 the phonophore is the 刀 dao1 (in a special form) on the right; the 至 component is telling you the meaning. It's much more common to have the phonophore on the right.)
I agree that the structure of the characters, such as it is, can be very helpful in remembering how to pronounce them. But that doesn't speak to reading unfamiliar characters in any way. Some components are quite prolific as phonophores: 交 jiao, 方 fang, and 青 qing come to mind. You're not advised to assume that a character incorporating them is pronounced jiao （校，效，咬）, fang (旁), or qing (精，猜 [cai1!]), though.
I am well aware that Chinese radical phonetic components are not as powerful as a phonetic alphabet. I am impliying no such thing. There are however many characters which carry phonetic information, such as my apparently crude example above. I have found this to be very helpful in remembering pronunciations of characters, even if they are only approximations. HN is a tough crowd.
Further, your experiences with Chinese people are not necessarily the same as mine.