I too was an old time Silk-head (actually an old time QAP-head, 1.0).
I have worked with QTP for about 4 months (version 8.2).
I have found both pluses and minuses between these two tools, but feel after 4 months that anything I could do with Silk and its strong, but proprietary, script lang, I can do with QTP.
You can perhaps get a better feel for QTP by carefully prowling through the following sticky postings located in the QTP forum:
One focuses on vbScript as it relates to QTP, while the other, probably more useful, provides an overview of QTP.
2 cents ON
And, as far as evaluating QTP, I know this suggestion is expensive, but buy a copy. The 2 week "free" evaluation copy just does not offer enough time to get a real feel for this (or any other complicated) test tool.
2 cents OFF