You are totally off base.
Places like Manhattan, Greenwich, CT and the Palm Beach/Boca Raton are are ALWAYS going to give large amounts of money to both parties. This is because they are extremely wealthy areas. However, they will almost always give to "top tier" candidates who can actually win, especially this early in the nomination process. Also, when they give it is usually the maximum amount and this is often done at fund raising parties.
People who live in $5 million+ mansions or penthouses ARE NOT making $98 credit card donations to ANY candidate and especially not to one who is proposing radical federal changes that will throw the economy into turmoil.
OK, you make a valid point.
BUT, regarding the techies(we’ll assume who are at least middle class) donating to Ron Paul, those are new participants in the political process. And they tend to live in zip codes that are overwhelmingly liberal.