Speakout, that sounds horrible, manipulative and wrong. But I often think that about your sister's set up, it doesn't sound very safe or helpful :(
Heartshaped - I'm sorry to hear of your experience. I'm a New Wine goer of many years so I understand what you're saying. There was a crazy couple of years in the 90s where it was that lion thing, it seemed to be everywhere and I found it very uncomfortable. I wondered how it fitted in with worship.
However, re experience of the Holy Spirit and tongues etc, it's been my experience that everyone is different and so of course won't be receiving stuff in the same way (which is why these very orchestrated 'shows' seem so odd). I think it's very much to do with personality- in my experience God works with who you are, and some people do experience his power in some ways, perhaps more 'out there' and some more gentle. It's never a forced thing and if the leadership are trying to do that it seems very false to me. Thankfully my experience of NW etc is far from that - it's very much about an invitation and not an expectation everyone will do something or feel the same effect at the same time.
Saying all that I've experienced this kind of thing many times, and it's always been at times I've needed to know God near me, and it's always been a very profound and life changing experience rather than just the odd nice shiver down spine etc. It's changed me, too, and that's what I believe we should look for with any of these types of things; does the person respond by being more kind, gentle, loving, faithful etc. If there's no such effect I'm not sure of the authenticity. Jesus seemed far more interested in our behaviour towards the vulnerable than whether we'd been knocked flat by the power of the spirit - but it is certainly the experience of so many that the power the spirit brings fills us with peace and with certainty, with grace and with a longing to tell others. Just like the earliest apostles at Pentecost.
I know many churches discount all such experience as mass hysteria, but I prefer to follow the example of Jesus and the early church, and I have no doubt that these gifts were used to build people up, and know that they still are, when used in careful and gentle ways.
I'm sorry for your experience. I guess there must be those who feel the need to fake in order to belong. But you cannot force God's hand.