It has definitely strongly impacted the price, but if you look at the volatility there is also a segment of the market that tried to be contrarian traders and attempted (and failed) to create a "sell the news" event. Price bounced down to $44/$45k twice immediately after the approval so some of the price pump was just bringing it twice back up from those drops.
And now price a few minutes ago went over $49k, though back to $48k now. And it hasn't even been 24 hours since the approval. ETFs start trading today, likely soaking up at least hundreds of millions if not billions of dollars in the coming days. Price is likely going to pass $50k soon.
Not really that surprising that price is very volatile around the event itself. There was definitely uncertainty about what the market would do immediately from the event. Now that its clear the price is pumping and the contrarian sell-the-news traders were beat out I think we'll see a steady rise a few thousand dollars higher which will show the immediate effect of the ETF, pumping the price from the $42-$46k range likely to low $50,000s as the short term effect, which is obviously a good short term result considering that the price had already strongly pumped recently in anticipation of the approval.
Not the immediate >$50k effect that I expected personally, but given the large segment that tried to crash the price it is pumping well and $50k will likely be getting hit by next week I would guess.
Of course the major effect of the ETFs will be long term as tens of billions of dollars of capital comes in through that avenue to soak up bitcoin supply.