  Electroweak precision measurements can provide indirect information about the
possible scale of supersymmetry already at the present level of accuracy. We
update the present-day sensitivities of precision data using the new
experimental top-quark mass, m_t = 172.7 \pm 2.9 GeV, within the constrained
minimal supersymmetric extension of the Standard Model (CMSSM), in which there
are three independent soft supersymmetry-breaking parameters m_{1/2}, m_0 and
A_0. In addition to M_W and sin^2 theta_eff, the analysis is based on
(g-2)_\mu, BR(b -> s gamma) and the lightest MSSM Higgs boson mass, M_h.
Assuming initially that the lightest supersymmetric particle (LSP) is a
neutralino, we display the CMSSM results as functions of m_{1/2}, fixing m_0 so
as to obtain the cold dark matter density allowed by WMAP and other
cosmological data for specific values of A_0, tan_beta and mu > 0. For a sample
value of tan_beta we analyze how the global chi^2 function would change
following a possible future evolution of the experimental central value of m_t
and its error. In a second step, we extend the analysis to other constrained
versions of the MSSM: the NUHM in which the soft supersymmetry-breaking
contributions to the Higgs masses are independent and the Higgs mixing
parameter mu and the pseudoscalar Higgs mass M_A become additional free
parameters compared to the CMSSM, a VCMSSM in which the bilinear soft
supersymmetry breaking parameter B_0 = A_0 - m_0, and the GDM in which the LSP
is the gravitino. In all scenarios we find indications for relatively light
soft supersymmetry-breaking masses, offering good prospects for the LHC and the
ILC, and in some cases also for the Tevatron.
