Yes.
Virtual particles aren't really what the name suggests. They are a pictorial representation of something called a Dyson Series:
https://en.wikipedia.org/wiki/Dyson_series
And the Casmir Effect is now known not to depend on it:
https://en.wikipedia.org/wiki/Casimir_effect#More_recent_theory
http://arxiv.org/abs/hep-th/0503158v1
'In discussions of the cosmological constant, the Casimir effect is often invoked as decisive evidence that the zero point energies of quantum fields are "real''. On the contrary, Casimir effects can be formulated and Casimir forces can be computed without reference to zero point energies. They are relativistic, quantum forces between charges and currents. The Casimir force (per unit area) between parallel plates vanishes as \alpha, the fine structure constant, goes to zero, and the standard result, which appears to be independent of \alpha, corresponds to the \alpha\to\infty limit.'
Unfortunately its one of a number of QM myths that are quite common:
http://arxiv.org/pdf/quant-ph/0609163v2.pdf
'The calculational tool represented by Feynman diagrams suggests an often abused picture according to which “real particles interact by exchanging virtual particles”. Many physicists, especially nonexperts, take this picture literally, as something that really and objectively happens in nature. In fact, I have never seen a popular text on particle physics in which this picture was not presented as something that really happens. Therefore, this picture of quantum interactions as processes in which virtual particles exchange is one of the most abused myths, not only in quantum physics, but in physics in general. Indeed, there is a consensus among experts for foundations of QFT that such a picture should not be taken literally. The fundamental principles of quantum theory do not even contain a notion of a “virtual” state. The notion of a “virtual particle” originates only from a specific mathematical method of calculation, called perturbative expansion'
Since they are quite common you will find many long and, unfortunately, sometimes heated threads about such things on this forum. When misconceptions are challenged some people get a bit 'wobbly' for want of a better word. Its takes time for the old ideas to be displaced and the new ones to settle in.
Thanks
Bill